Whether on Earth or above it, hilarity is outrageously universal in TV's most popular comedy featuring four forward-thinking but socially backward geniuses. Fun discoveries multiply: Leonard learns jealousy is bad for a relationship [with Penny] but science is good for seduction [of Penny]. Howard finds life on the International Space Station is no escape from terrestrial turmoil between his overbearing mum and his new wife Bernadette. Raj meets someone special who may be a good match, if only he can keep her from fleeing mid-date.
Even Sheldon learns a few things:
a) What not to say when called in to meet the university's employee relations director,
b) What happens to childhood TV idols and
c) That a Dungeons and Dragons adventure can be the icebreaker his relationship with Amy needs.

For those who need laughter with scientific regularity, this 3-disc, 24-episode Season Six set of The Big Bang Theory will rock your cosmos.