DC's Legends of Tomorrow - Season 1, Episode 2: Soundtracks

(October 19, 1975 - Ivy Town) Dr. Martin, Jax and Sara go to Ivy University in search of the younger Martin Stein and his alpha particle detector.  

Martin, Sara and Jax hangout with the younger Martin in his lounge where he offers them pot; Dr. Martin asks Martin about his alpha particle tracker while trying to convince him not to smoke pot.