His final appearance in a show produced by another person came on NCIS: Los Angeles. Sheridan appeared in the episode “Enemy Within,” portraying a Navy Captain.

Watch the official "Sending a Message" clip from the CBS action series NCIS: Los Angeles Season 14 Episode 8, created by Shane Brennan. NCIS: Los Angeles Cast: LL Cool J, Chris O'Donnell, Daniela ...

He starred on NCIS: Los Angeles for all of its 14 seasons, and that is where he met actress Daniela Ruah — the aforementioned Aunt Dani — who became his sister-in-law in 2014.