This episode of The Big Bang Theory pays its respects to Trekkies while also marking a turning point in Sheldon's growth as a ...

The Big Bang Theory may be divisive, but there are episodes that will make new viewers fall in love with Sheldon and the rest of the Pasadena gang.

Best known for popularizing the character of Spock, Nimoy has made countless cameos reprising the character, including on CBS' hit comedy "The Big Bang Theory." Perhaps his best appearance on the ...