Det. Danny Reagan (10 episodes)

Executive Producer (10 episodes)

Self - Guest (1 episode)

Self (1 episode)

Self - Guest (3 episodes)

Self (archive footage) (uncredited) (1 episode)

Self (3 episodes)

Cluedle-Doo (1 episode)

Self (2 episodes)

Self - Host (68 episodes)

(1 episode)

Self (1 episode)

Self - Co-narrator (3 episodes)

Donnie Wahlberg (1 episode)

Himself

Himself (26 episodes)

Self (96 episodes)

Self (1 episode)

Self - Guest (6 episodes)

Shane

Self - New Kids on the Block (2 episodes)

Danny Reagan (293 episodes)

Director (1 episode)

Joey Grant (2 episodes)

Jimmy McCabe / Jimmy Porter (1 episode)

Detective Mike Moriarty

Himself

Detective Moran

Author

Det. Ted Riley

Eric Matthews

Horst Cali (8 episodes)

Det. Lipton

Andy Burnett

Eric Matthews

Self (1 episode)

Paul Rader (9 episodes)

Kirk', CIA operative (2 episodes)

Lt. Burton

Randall Ipswitch

(1 episode)

Detective Eric Matthews

Eric Matthews

Self (1 episode)

(1 episode)

Duddits

Self - Guest (1 episode)

Detective Joel Stevens (24 episodes)

(1 episode)

Terry Malloy

(1 episode)

C. Carwood Lipton (10 episodes)

Bobby Walker

Chollo

Self (1 episode)

Patrick Rooney (1 episode)

Vincent Grey

Deputy Glen / Billy the Kid

Rick Damon

Danny Quinn

Booker

Mr. Grey

Greggo

Cubby Barnes

Big Balls

Donnie Wahlberg (1 episode)

Self - New Kids on the Block (1 episode)

Self

(4 episodes)

Self