G. Callen is a fictional character portrayed by Chris O'Donnell in the TV series NCIS: Hawai'i.
In the first episode they appeared in, titled Deep Fake (season 2), they were 52 years old.
They appear in 1 episodes out of a total of 54 aired
Episodes1
Deep Fake
episode S2.E10 january 2023In Washington D.C. to celebrate the retirement of a former professor. NCIS agents are forced to investigate the professor's suicide. Tennant, Jimmy Palmer and Sam Hanna are kidnapped, and it all ties into the mysterious suicide.