Self - Guest (1 episode)

Tony DiNozzo (10 episodes)

Executive Producer (10 episodes)

Jason Bull (125 episodes)

Director (3 episodes)

Self (2 episodes)

Tony DiNozzo (1 episode)

Anthony DiNozzo (1 episode)

Self (1 episode)

Self (2 episodes)

Danny Valentine

Tom

Robert Wagner (2 episodes)

Robert Wagner

Tony DiNozzo (307 episodes)

Director (2 episodes)

Anthony DiNozzo (2 episodes)

Bill

Cody Battle Vandermeer

Wayne Keebler (1 episode)

Logan Cale (42 episodes)

Verdict

Jack Vallone (1 episode)

Dave Juniper

Boone

Mick Simons

(1 episode)

Brendan Rowe (1 episode)

Roy (6 episodes)

Hap

Kevin, Captive

Ben Chasen (6 episodes)

Dr. Matthew Rogers (2 episodes)

Dr. Matthew Rogers

Dean Sparks

Cooper Alden (289 episodes)