Sam, Callen and Kensi investigate the scene in the January 26, 2010 episode of NCIS: Los Angeles. What they find may surprise even these pros.

Kensi Blye, G. Callen and Sam Hanna in the January 26, 2010 episode of NCIS: Los Angeles, called "Missing." The gang finds one of its own in danger.

Callen, Sam and Kensi Hanna in the January 26, 2010 episode of NCIS: Los Angeles. It's called "Missing." Who do you think IS missing?

Chris O'Donnell has been terrific so far as G. Callen on NCIS: Los Angeles. He's the undercover agent to end all undercover agents.

Sam Hanna in the January 26, 2010 episode of NCIS: Los Angeles. It's called "Missing."

Callen is the man. He's so bad ass he doesn't even have a first name!