Leslie and Leonard are PMS

Leslie and Leonard are PMS

When Leonard kicks Sheldon out of his trivia group, be brings in Leslie Winkle to replace him for their team, PMS.
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The Big Bang Theory Season 1 Episode 13 Quotes

Penny: What actor holds the record for being named People magazine's Sexiest Man Alive?
Sheldon: William Shatner!
Leonard: I don't think it's Shatner.
Sheldon: Then it's got to be Patrick Stewart

Sheldon: Teams are traditionally named after fierce creatures, thus intimidating one's opponent.
Raj: Then we could be the Bengal Tigers.
Sheldon: Poor choice—gram for gram, no animal exceeds the relative fighting strength of the army ant.
Raj: Maybe so, but you can't incinerate a Bengal tiger with a magnifying glass