NCIS Database

Callen, G. is the twenty-fourth episode and season finale episode of NCIS: Los Angeles Season 1.


OSP races against time to stop a brutal, murderous cabal from launching a deadly nuclear war in the Middle East while Callen discovers some answers concerning his mysterious past and true identity.


Callen after learning from the adoptive mother that Amy told her she has a brother.

Major Events

  • Callen finds evidence suggesting that he has a sister named Amy.
  • It's revealed that Trent Kort and Callen know each other, having worked together in the past.
  • Callen later discovers that his "sister" is in fact a woman named Hannah Lawson and the real Amy had drowned in an accident when she was eleven years old.


  • This is also the last episode of the entire NCIS: Los Angeles series to have Peter Cambor listed as one of the main cast members. In all future appearances, he would be credited as a Special Guest Star.
  • It is interesting to point out that during Callen's visit to Amy's foster home, when he stares at the wall containing the photos of the children who have lived at this home, a lot of the photos are used two or three times.
  • Charlie O'Donnell and Lily O'Donnell are the children of series regular Chris O'Donnell (G. Callen).


Series Regulars

Name Portrayed by Role
G. Callen Chris O'Donnell An NCIS Special Agent in charge of the Office of Special Projects field team and who is partnered with fellow NCIS Special Agent Sam Hanna.
Kensi Blye Daniela Ruah An NCIS Special Agent with the Office of Special Projects.
Sam Hanna LL Cool J An NCIS Special Agent with the Office of Special Projects and who is partnered with NCIS Special Agent G. Callen.
Nate Getz Peter Cambor Psychologist with the Office of Special Projects.
Henrietta Lange Linda Hunt Operations Manager for the Office of Special Projects.
Eric Beale Barrett Foa Tech Operator for the Office of Special Projects.

Other Cast

Name Portrayed by Role
Trent Kort David Dayan Fisher CIA agent.
Amy Taylor Jacqueline McKenzie
Karim Akbari Eli Danker
Jessica Haymes Nancy Linehan Charles
Adoptive Mother Sarah Batsheva Graham
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