5 things you don’t know about ‘The Office’ season 5

Now Playing: Watch NBC News Live stream on NBC News Channel: Now Playing The ‘The Big Bang Theory’ finale will be on Sunday, Jan. 3 at 10 p.m.

ET Now Playing ‘The Good Doctor’: Meet ‘The Doctors’ Dr. Jillian Holtzman Now Playing Jodie Foster, Katie Holmes and more on ‘The Leftovers’ Now Playing What you need to know about the new season of ‘The Walking Dead’ Now Play: Watch new ‘The Last Man On Earth’ trailer Now Playing Why you should watch ‘The Bachelor’ Now The Leftovers returns for a third season on Sunday night, January 3 at 8 p..m., ET on NBC Now Playing How ‘Game of Thrones’ got the series back on track Now Playing Kanye West is coming back to TV, with a cameo on ‘Nip/Tuck’ Now: ‘The Simpsons’ new host, Lisa Kudrow, takes on ‘Luther’ Now What you missed from the show’s fifth season