Montesinos — Eduardo (Henchman) Eduardo Garcia — Emilio (Henchman) Gonzalo Menendez — Pablo (Henchman) David Labiosa — David Gomez (Henchman) Singer family and associates Riley Smith — Kyle Singer (First time "drug dealer") Ted Marcoux — Sam Singer (Kyle's unemployed father) Lucinda Jenney — Helen Singer (Kyle's mother) Agnes Bruckner — Linda (Kyle's girlfriend) Kett Turton — Tim (Kyle's best friend) Darin Cooper — Don (the Singer family's landlord) National Health Services Andrea Thompson — Dr. Nicole Duncan Christina Chang — Dr. Sunny Macer Miscellaneous police / Federal employees / Medical Paul Vincent O’Connor — Police Chief Hendrix Tony Todd — Detective Michael Norris (interrogates Julia Milliken) Simon Templeman — Trevor Tomlinson (Agent in MI6 office in LA; killed in gunship attack) Maria del Mar — Rachel Forrester Kevin Chapman — Kevin Mitchell Chandler Plaza Hotel staff and guests Doug Savant — Craig Phillips (Head of Hotel security) Paris Tanaka — Maya Sue Jin Song — Annalie Kim Scott Klace — Danny Brigid Brannagh — Kathy McCartney Miscellaneous characters Sarah Wynter — Kate Warner (Ex-girlfriend of Jack Bauer) Sarah Clarke — Nina Myers (Terrorist; Former CTU agent) Geoff Pierson — John Keeler (Republican Presidential Candidate) Mark Rolston — Bruce Foxton (professional evidence retriever) Carlos Gómez — Luis Annicon (Prison Supervisor; one of Jack's companions in the one year operation that brought down Ramon Salazar) Kamala Lopez-Dawson — Theresa Ortega (Gael's wife) JF Pryor — Zack Porter (Drug-dealer) Jack Kehler — Kevin Kelly Matt Salinger — Mark Kanar Rick Garcia — Rick Garcia Patrick Fabian — William Cole Jenni Blong — Susan Cole 24: Season 4 Department of Defense / Heller's family Kiefer Sutherland — Jack Bauer (Special Assistant to the Secretary of Defense) William Devane — James Heller(United States Secretary of Defense) Logan Marshall-Green — Richard Heller (James Heller's son) Kim Raver — Audrey Raines(James Heller's daughter; Jack Bauer's girlfriend; Senior Policy Assistant to Heller) James Frain — Paul Raines (Audrey's estranged husband) David Newsom — Scott Borman (Heller's aide) CTU / Division Carlos Bernard — Tony Almeida Reiko Aylesworth — Michelle Dessler Alberta Watson — Erin Driscoll Mary Lynn Rajskub — Chloe O'Brian James Morrison — Bill Buchanan Roger Cross — Curtis Manning Lana Parrilla — Sarah Gavin Louis Lombardi — Edgar Stiles Aisha Tyler — Marianne Taylor Robert Cicchini — Howard Bern Cameron Bancroft — Lee Castle Shawn Doyle — Ronnie Lobell Thomas Vincent Kelly — Marc Besson