- as Secret Service Agent Frank Horrigan
- as Mitch Leary
- as Secret Service Agent Lilly Raines
- as Secret Service Agent Al D'Andrea
- as Bill Watts
- as Harry Sargent
- as Sam Campagna
- as Matt Wilder
- as Jack Okura
- as Tony Carducci
- as Mendoza
- as Jimmy Hendrickson
- as Raul
- as Booth's Landlady
- as Paramedic
- as Pam Magnus
- as LAPD Brass
- as FBI Technician
- as FBI Supervisor
- as Young Agent
- as Professor Riger
- as CIA Agent Collins
- as Hunter
- as Hunter
- as Police Captain Howard
- as FBI Official
- as Bartender
- as Agent Chavez
- as Sanford Riggs
- as Man at Bank
- as Woman at Bank
- as Agent Cozart
- as Secret Service Agent
- as CIA Agent David Coppinger
- as D.C. Police Officer
Watch "In the Line of Fire":