Nell has a big decision to make on Sunday's season 12 finale.
The season 12 finale airs Sunday, May 23 at 9 p.m. ET/PT on CBS.
Plus, the 'NCIS: Los Angeles' star dishes on Callen's dilemmas in the current season of the hit CBS show.
ET also spoke with Chris O'Donnell about his big episode of 'NCIS: LA' airing this Sunday on CBS.
The pair co-starred in the teen romance back in 1995.
It's Harm (David James Elliott) and Mac (Catherine Bell), together again! The new season premieres Sunday, Sept. 29 at p.m. ET/PT on CB
ET was exclusively on set of 'NCIS: Los Angeles' ahead of Kensi and Deeks' wedding episode airing 9 p.m. Sunday on CBS.
The search is on Sunday for the franchise's Linda Hunt, whose character has been missing since the beginning of last season.
ET was on set with Chris O'Donnell and LL Cool J as they reached a major TV milestone.
ET caught up with the actor on Thursday at the Ping Pong 4 Purpose event in Los Angeles, where he opened up about the upcoming season of the hit CBS show.
ET sat down with Batgirl and Robin, who opened up about working on the 1997 cult classic.
The third sequel in the 'Batman' franchise turns 20 years old! Here's what Batgirl and Robin think about the movie today.
The 54-year-old actor and his wife, Amal, welcomed twins on Tuesday. These seven celebs couldn't be more excited for the new parents!
EXCLUSIVE: Julie Chen Praises George Clooney's Dad Skills and 8 More A-List Pals Who Can't Stop Gushing!
