Bonanza chronicles the weekly adventures of the Cartwright family, headed by the thrice-widowed patriarch Ben Cartwright. He had three sons, each by a different wife: the eldest was the urbane architect Adam Cartwright who built the ranch house; the second was the warm and lovable giant Eric "Hoss" Cartwright; and the youngest was the hotheaded and impetuous Joseph or "Little Joe". The family's cook was the Chinese immigrant Hop Sing.
Bonanza chronicles the weekly adventures of the Cartwright family, headed by the thrice-widowed patriarch Ben Cartwright. He had three sons, each by a different wife: the eldest was the urbane architect Adam Cartwright who built the ranch house; the second was the warm and lovable giant Eric "Hoss" Cartwright; and the youngest was the hotheaded and impetuous Joseph or "Little Joe". The family's cook was the Chinese immigrant Hop Sing.
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Seasons (14)
Season 1
12 Sep 1959 – 30 Apr 1960 · 32 episodes
1A Rose for Lotta (Pilot)12 Sep 1959
2Death on Sun Mountain19 Sep 1959
3The Newcomers26 Sep 1959
4The Paiute War3 Oct 1959
5Enter Mark Twain10 Oct 1959
6The Julia Bulette Story17 Oct 1959
7The Saga of Annie O'Toole24 Oct 1959
8The Phillip Diedesheimer Story31 Oct 1959
9Mr. Henry Comstock7 Nov 1959
10The Magnificent Adah14 Nov 1959
11The Truckee Strip21 Nov 1959
12The Hanging Posse28 Nov 1959
13Vendetta5 Dec 1959
14The Sisters12 Dec 1959
15The Last Hunt19 Dec 1959
16El Toro Grande2 Jan 1960
17The Outcast9 Jan 1960
18A House Divided16 Jan 1960
19The Gunmen23 Jan 1960
20The Fear Merchants30 Jan 1960
21The Spanish Grant6 Feb 1960
22Blood on the Land13 Feb 1960
23Desert Justice20 Feb 1960
24The Stranger27 Feb 1960
25Escape to Ponderosa5 Mar 1960
26The Avenger19 Mar 1960
27The Last Trophy26 Mar 1960
28San Francisco2 Apr 1960
29Bitter Water9 Apr 1960
30Feet of Clay16 Apr 1960
31Dark Star23 Apr 1960
32Death at Dawn30 Apr 1960
Season 2
10 Sep 1960 – 3 Jun 1961 · 34 episodes
1Showdown10 Sep 1960
2The Mission17 Sep 1960
3Badge Without Honor24 Sep 1960
4The Mill1 Oct 1960
5The Hopefuls8 Oct 1960
6Denver McKee15 Oct 1960
7Day of Reckoning22 Oct 1960
8The Abduction29 Oct 1960
9Breed of Violence5 Nov 1960
10The Last Viking12 Nov 1960
11The Trail Gang26 Nov 1960
12The Savage3 Dec 1960
13Silent Thunder10 Dec 1960
14The Ape17 Dec 1960
15The Blood Line31 Dec 1960
16The Courtship7 Jan 1961
17The Spitfire14 Jan 1961
18The Bride21 Jan 1961
19Bank Run28 Jan 1961
20The Fugitive4 Feb 1961
21Vengeance11 Feb 1961
22The Tax Collector18 Feb 1961
23The Rescue25 Feb 1961
24The Dark Gate4 Mar 1961
25The Duke11 Mar 1961
26Cutthroat Junction18 Mar 1961
27The Gift1 Apr 1961
28The Rival15 Apr 1961
29The Infernal Machine22 Apr 1961
30The Thunderhead Swindle29 Apr 1961
31The Secret6 May 1961
32The Dream Riders20 May 1961
33Elizabeth, My Love27 May 1961
34Sam Hill3 Jun 1961
Season 3
24 Sep 1961 – 20 May 1962 · 34 episodes
1The Smiler24 Sep 1961
2Springtime1 Oct 1961
3The Honor of Cochise8 Oct 1961
4The Lonely House15 Oct 1961
5The Burma Rarity22 Oct 1961
6Broken Ballad29 Oct 1961
7The Many Faces of Gideon Flinch5 Nov 1961
8The Friendship12 Nov 1961
9The Countess19 Nov 1961
10The Horse Breaker26 Nov 1961
11Day of the Dragon3 Dec 1961
12The Frenchman10 Dec 1961
13The Tin Badge17 Dec 1961
14Gabrielle24 Dec 1961
15Land Grab31 Dec 1961
16The Tall Stranger7 Jan 1962
17The Lady from Baltimore14 Jan 1962
18The Ride21 Jan 1962
19The Storm28 Jan 1962
20The Auld Sod4 Feb 1962
21Gift of Water11 Feb 1962
22The Jackknife18 Feb 1962
23The Guilty25 Feb 1962
24The Wooing of Abigail Jones4 Mar 1962
25The Lawmaker11 Mar 1962
26Look to the Stars18 Mar 1962
27The Gamble1 Apr 1962
28The Crucible8 Apr 1962
29Inger, My Love15 Apr 1962
30Blessed Are They22 Apr 1962
31The Dowry29 Apr 1962
32The Long Night6 May 1962
33The Mountain Girl13 May 1962
34The Miracle Maker20 May 1962
Season 4
23 Sep 1962 – 26 May 1963 · 34 episodes
1The First Born23 Sep 1962
2The Quest30 Sep 1962
3The Artist7 Oct 1962
4A Hot Day for a Hanging14 Oct 1962
5The Deserter21 Oct 1962
6The Way Station29 Oct 1962
7The War Comes to Washoe4 Nov 1962
8Knight Errant18 Nov 1962
9The Beginning25 Nov 1962
10The Deadly Ones2 Dec 1962
11Gallagher's Sons9 Dec 1962
12The Decision16 Dec 1962
13The Good Samaritan23 Dec 1962
14The Jury30 Dec 1962
15The Colonel6 Jan 1963
16Song in the Dark13 Jan 1963
17Elegy for a Hangman20 Jan 1963
18Half a Rogue27 Jan 1963
19The Last Haircut3 Feb 1963
20Marie, My Love10 Feb 1963
21The Hayburner17 Feb 1963
22The Actress24 Feb 1963
23A Stranger Passed This Way3 Mar 1963
24The Way of Aaron10 Mar 1963
25A Woman Lost17 Mar 1963
26Any Friend of Walter's24 Mar 1963
27Mirror of a Man31 Mar 1963
28My Brother's Keeper7 Apr 1963
29Five Into the Wind21 Apr 1963
30Saga of Whizzer McGee28 Apr 1963
31Thunder Man5 May 1963
32Rich Man, Poor Man12 May 1963
33The Boss19 May 1963
34Little Man... Ten Feet Tall26 May 1963
Season 5
22 Sep 1963 – 24 May 1964 · 34 episodes
1She Walks in Beauty22 Sep 1963
2A Passion for Justice29 Sep 1963
3Rain from Heaven6 Oct 1963
4Twilight Town13 Oct 1963
5The Toy Soldier20 Oct 1963
6A Question of Strength27 Oct 1963
7Calamity Over the Comstock3 Nov 1963
8Journey Remembered10 Nov 1963
9The Quality of Mercy17 Nov 1963
10The Waiting Game8 Dec 1963
11The Legacy15 Dec 1963
12Hoss and the Leprechauns22 Dec 1963
13The Prime of Life29 Dec 1963
14The Lila Conrad Story5 Jan 1964
15Ponderosa Matador12 Jan 1964
16My Son, My Son19 Jan 1964
17Alias Joe Cartwright26 Jan 1964
18The Gentleman from New Orleans2 Feb 1964
19The Cheating Game9 Feb 1964
20Bullet for a Bride16 Feb 1964
21King of the Mountain23 Feb 1964
22Love Me Not1 Mar 1964
23The Pure Truth8 Mar 1964
24No Less a Man15 Mar 1964
25Return to Honor22 Mar 1964
26The Saga of Muley Jones29 Mar 1964
27The Roper5 Apr 1964
28A Pink Cloud Comes from Old Cathay12 Apr 1964
29The Companeros19 Apr 1964
30Enter Thomas Bowers26 Apr 1964
31The Dark Past3 May 1964
32The Pressure Game10 May 1964
33Triangle17 May 1964
34Walter and the Outlaws24 May 1964
Season 6
20 Sep 1964 – 23 May 1965 · 34 episodes
1Invention of a Gunfighter20 Sep 1964
2The Hostage27 Sep 1964
3The Wild One4 Oct 1964
4Thanks for Everything, Friend11 Oct 1964
5Logan's Treasure18 Oct 1964
6The Scapegoat25 Oct 1964
7A Dime's Worth of Glory1 Nov 1964
8Square Deal Sam8 Nov 1964
9Between Heaven and Earth15 Nov 1964
10Old Sheba22 Nov 1964
11A Man to Admire6 Dec 1964
12The Underdog13 Dec 1964
13A Knight to Remember20 Dec 1964
14The Saga of Squaw Charlie27 Dec 1964
15The Flapjack Contest3 Jan 1965
16The Far, Far Better Thing10 Jan 1965
17Woman of Fire17 Jan 1965
18The Ballerina24 Jan 1965
19The Flannel-Mouth Gun31 Jan 1965
20The Ponderosa Birdman7 Feb 1965
21The Search14 Feb 1965
22The Deadliest Game21 Feb 1965
23Once a Doctor28 Feb 1965
24Right is the Fourth R7 Mar 1965
25Hound Dog21 Mar 1965
26The Trap28 Mar 1965
27Dead and Gone4 Apr 1965
28A Good Night's Rest11 Apr 1965
29To Own the World18 Apr 1965
30Lothario Larkin25 Apr 1965
31The Return2 May 1965
32Jonah9 May 1965
33The Spotlight16 May 1965
34Patchwork Man23 May 1965
Season 7
12 Sep 1965 – 15 May 1966 · 33 episodes
1The Debt12 Sep 1965
2The Dilemma19 Sep 1965
3The Brass Box26 Sep 1965
4The Other Son3 Oct 1965
5The Lonely Runner10 Oct 1965
6Devil on Her Shoulder17 Oct 1965
7Found Child24 Oct 1965
8The Meredith Smith31 Oct 1965
9Mighty is the Word7 Nov 1965
10The Strange One14 Nov 1965
11The Reluctant Rebel21 Nov 1965
12Five Sundowns to Sunup5 Dec 1965
13A Natural Wizard12 Dec 1965
14All Ye His Saints19 Dec 1965
15The Dublin Lad2 Jan 1966
16To Kill a Buffalo9 Jan 1966
17Ride the Wind (1)16 Jan 1966
18Ride the Wind (2)23 Jan 1966
19Destiny's Child30 Jan 1966
20Peace Officer6 Feb 1966
21The Code13 Feb 1966
22Three Brides for Hoss20 Feb 1966
23The Emperor Norton27 Feb 1966
24Her Brother's Keeper6 Mar 1966
25The Trouble with Jamie20 Mar 1966
26Shining in Spain27 Mar 1966
27The Genius3 Apr 1966
28The Unwritten Commandment10 Apr 1966
29Big Shadows on the Land17 Apr 1966
30The Fighters24 Apr 1966
31Home from the Sea1 May 1966
32The Last Mission8 May 1966
33A Dollar's Worth of Trouble15 May 1966
Season 8
11 Sep 1966 – 14 May 1967 · 34 episodes
1Something Hurt, Something Wild11 Sep 1966
2Horse of a Different Hue18 Sep 1966
3A Time to Step Down25 Sep 1966
4The Pursued (1)2 Oct 1966
5The Pursued (2)9 Oct 1966
6To Bloom for Thee16 Oct 1966
7Credit for a Kill23 Oct 1966
8Four Sisters from Boston30 Oct 1966
9Old Charlie6 Nov 1966
10Ballad of the Ponderosa13 Nov 1966
11The Oath20 Nov 1966
12A Real Nice, Friendly Little Town27 Nov 1966
13The Bridegroom4 Dec 1966
14Tommy18 Dec 1966
15A Christmas Story25 Dec 1966
16Ponderosa Explosion1 Jan 1967
17Justice8 Jan 1967
18A Bride for Buford15 Jan 1967
19Black Friday22 Jan 1967
20The Unseen Wound29 Jan 1967
21Journey to Terror5 Feb 1967
22Amigo12 Feb 1967
23A Woman in the House19 Feb 1967
24Judgment at Red Creek26 Feb 1967
25Joe Cartwright, Detective5 Mar 1967
26Dark Enough to See the Stars12 Mar 1967
27The Deed and the Dilemma26 Mar 1967
28The Prince2 Apr 1967
29A Man Without Land9 Apr 1967
30Napoleon's Children16 Apr 1967
31The Wormwood Cup23 Apr 1967
32Clarissa30 Apr 1967
33Maestro Hoss7 May 1967
34The Greedy Ones14 May 1967
Season 9
17 Sep 1967 – 28 Jul 1968 · 34 episodes
1Second Chance17 Sep 1967
2Sense of Duty24 Sep 1967
3The Conquistadors1 Oct 1967
4Judgment at Olympus8 Oct 1967
5Night of Reckoning15 Oct 1967
6False Witness22 Oct 1967
7The Gentle Ones29 Oct 1967
8Desperate Passage5 Nov 1967
9The Sure Thing12 Nov 1967
10Showdown at Tahoe19 Nov 1967
11Six Black Horses26 Nov 1967
12Check Rein3 Dec 1967
13Justice Deferred17 Dec 1967
14The Gold Detector24 Dec 1967
15The Trackers7 Jan 1968
16A Girl Named George14 Jan 1968
17The Thirteenth Man21 Jan 1968
18The Burning Sky28 Jan 1968
19The Price of Salt4 Feb 1968
20Blood Tie18 Feb 1968
21The Crime of Johnny Mule25 Feb 1968
22The Late Ben Cartwright3 Mar 1968
23Star Crossed10 Mar 1968
24Trouble Town17 Mar 1968
25Commitment at Angelus7 Apr 1968
26A Dream to Dream14 Apr 1968
27In Defense of Honor28 Apr 1968
28To Die in Darkness5 May 1968
29The Bottle Fighter12 May 1968
30The Arrival of Eddie19 May 1968
31The Stronghold26 May 1968
32Pride of a Man2 Jun 1968
33A Severe Case of Matrimony7 Jul 1968
34Stage Door Johnnies28 Jul 1968
Season 10
15 Sep 1968 – 11 May 1969 · 30 episodes
1Different Pines, Same Wind15 Sep 1968
2Child22 Sep 1968
3Salute to Yesterday29 Sep 1968
4The Real People of Muddy Creek6 Oct 1968
5The Passing of a King13 Oct 1968
6The Last Vote20 Oct 1968
7Catch as Catch Can27 Oct 1968
8Little Girl Lost3 Nov 1968
9The Survivors10 Nov 1968
10The Sound of Drums17 Nov 1968
11Queen High1 Dec 1968
12Yonder Man8 Dec 1968
13Mark of Guilt15 Dec 1968
14A World Full of Cannibals22 Dec 1968
15Sweet Annie Laurie5 Jan 1969
16My Friend, My Enemy12 Jan 1969
17Mrs. Wharton and the Lesser Breeds19 Jan 1969
18Erin26 Jan 1969
19Company of Forgotten Men2 Feb 1969
20The Clarion9 Feb 1969
21The Lady and the Mountain Lion23 Feb 1969
22Five Candles2 Mar 1969
23The Wish9 Mar 1969
24The Deserter16 Mar 1969
25Emily23 Mar 1969
26The Running Man30 Mar 1969
27The Unwanted6 Apr 1969
28Speak No Evil20 Apr 1969
29The Fence27 Apr 1969
30A Ride in the Sun11 May 1969
Season 11
14 Sep 1969 – 19 Apr 1970 · 28 episodes
1Another Windmill to Go14 Sep 1969
2The Witness21 Sep 1969
3The Silence at Stillwater28 Sep 1969
4A Lawman's Lot is Not a Happy One5 Oct 1969
5Anatomy of a Lynching12 Oct 1969
6To Stop a War19 Oct 1969
7The Medal26 Oct 1969
8The Stalker2 Nov 1969
9Meena16 Nov 1969
10A Darker Shadow23 Nov 1969
11Dead Wrong7 Dec 1969
12Old Friends14 Dec 1969
13Abner Willoughby's Return21 Dec 1969
14It's a Small World4 Jan 1970
15Danger Road11 Jan 1970
16The Big Jackpot18 Jan 1970
17The Trouble with Amy25 Jan 1970
18The Lady and the Mark1 Feb 1970
19Is There Any Man Here8 Feb 1970
20The Law and Billy Burgess15 Feb 1970
21Long Way to Ogden22 Feb 1970
22Return Engagement1 Mar 1970
23The Gold Mine8 Mar 1970
24Decision at Los Robles22 Mar 1970
25Caution, Easter Bunny Crossing29 Mar 1970
26The Horse Traders5 Apr 1970
27What Are Pardners For?12 Apr 1970
28A Matter of Circumstance19 Apr 1970
Season 12
13 Sep 1970 – 11 Apr 1971 · 28 episodes
1The Night Virginia City Died13 Sep 1970
2A Matter of Faith20 Sep 1970
3The Weary Willies27 Sep 1970
4The Wagon4 Oct 1970
5The Power of Life and Death11 Oct 1970
6Gideon, the Good18 Oct 1970
7The Trouble with Trouble25 Oct 1970
8Thornton's Account1 Nov 1970
9The Love Child8 Nov 1970
10El Jefe15 Nov 1970
11The Luck of Pepper Shannon22 Nov 1970
12The Impostors13 Dec 1970
13Honest John20 Dec 1970
14For a Young Lady27 Dec 1970
15A Single Pilgrim3 Jan 1971
16The Gold-Plated Rifle10 Jan 1971
17Top Hand17 Jan 1971
18A Deck of Aces31 Jan 1971
19The Desperado7 Feb 1971
20The Reluctant American14 Feb 1971
21Shadow of a Hero21 Feb 1971
22The Silent Killer28 Feb 1971
23Terror at 2:007 Mar 1971
24The Stillness Within14 Mar 1971
25A Time to Die21 Mar 1971
26Winter Kill28 Mar 1971
27Kingdom of Fear4 Apr 1971
28An Earthquake Called Callahan11 Apr 1971
Season 13
19 Sep 1971 – 2 Apr 1972 · 26 episodes
1The Grand Swing19 Sep 1971
2Fallen Woman26 Sep 1971
3Bushwhacked3 Oct 1971
4Rock-a-Bye, Hoss10 Oct 1971
5The Prisoners17 Oct 1971
6Cassie24 Oct 1971
7Don't Cry, My Son31 Oct 1971
8Face of Fear14 Nov 1971
9Blind Hunch21 Nov 1971
10The Iron Butterfly28 Nov 1971
11The Rattlesnake Brigade5 Dec 1971
12Easy Come, Easy Go12 Dec 1971
13A Home for Jamie19 Dec 1971
14Warbonnet26 Dec 1971
15A Lonely Man2 Jan 1972
16Second Sight9 Jan 1972
17The Saddle Stiff16 Jan 1972
18Frenzy30 Jan 1972
19Customs of the Country6 Feb 1972
20Shanklin13 Feb 1972
21Search in Limbo20 Feb 1972
22He Was Only Seven5 Mar 1972
23The Younger Brothers' Younger Brother12 Mar 1972