The Big Bang Theory Season 3 Episode 12 : The Psychic Vortex

Leonard and Penny's relationship hits an impasse when, while on a double-date with Howard and Bernadette, she reveals that she takes career advice from a psychic, only for Leonard to laugh at her, infuriating her. Later, Howard shows Leonard that if he wants to be able to ever be in a relationship, he'll have to accept that people will have differing beliefs. Leonard apologizes to Penny and agrees to visit her psychic, despite her having declined...