How to Stay Young Main cast, played by Dr. Chris van Tulleken Episode 1x01: Episode 1 (Apr 7, 2016) Episode 1x02: Episode 2 (Apr 14, 2016) Episode 2x01: Episode 1 (Sep 13, 2017) Episode 2x02: Episode 2 (Sep 20, 2017) Episode 2x03: Episode 3 (Sep 27, 2017)