Find out who framed who on tonight's episode of "NCIS" when "Sex and the City"'s David Eigenberg guest stars.

Gibbs (Mark Harmon), DiNozzo (Michael Weatherly) and the team find themselves in the precarious position of having to rely on information from some questionable individuals in their efforts to stop a criminal bent on stealing government secrets on tonight's "Dagger" episode of "NCIS."

"[Special Agent] Michelle Lee (guest star Liza Lapira) comes back and [Gibbs and the team] find out things about her that haunt us and her," Cote de Pablo, who plays Ziva, tells ET's Thea Andrews. "It is a heavy episode and highly emotional. I just watched the ending to that storyline and it broke my heart. It is the first time we have done something like that. It is sort of beautiful because it is all for love."

"NCIS" airs Tuesday nights at 8 p.m. on CBS.