Season 1
- 1Get Thin Fast2 Jan 2019
- 2Sleep Deprivation9 Jan 2019
- 3HIIT versus Easy16 Jan 2019
- 4Better Brain23 Jan 2019
- 5Giving Up Smoking30 Jan 2019
- 6Learn a Language6 Feb 2019
Doctors Chris van Tulleken and Xand van Tulleken put competing health therapies to the test with the help of thirty other pairs of identical twins - the perfect candidates for scientific comparison.