NCIS

When a figure from Tennant’s (Vanessa Lachey) CIA past re-emerges, the NCIS team seeks help from the most unlikely place to catch a killer who threatens to destroy everything Tennant has built.

Kensi and Deeks are sent undercover as married couple Melissa and Justin when evidence points to a Russian sleeper cell in a suburban neighborhood.

Callen and the NCIS team confront their vengeful adversary, the Chameleon, when an undercover case ignites a deadly mind game, on part one of a special two-hour season finale.