Best TV Twists: 'Dexter' or 'Revenge'? 'Supernatural' or 'Once Upon a Time'?Lady Gaga 'nervous' during 'Simpsons' performance'Two and a Half Men's' Thursday move: CBS gives an aging show a new caretaker'Ghost Hunters' Grant Wilson: 'I'll never stop investigating''Saturday Night Live': Mick Jagger shows Kristen Wiig some rocker magic