Special guest star

Special guest star is a casting designation usually reserved for big name actors or previous cast members. It is similar to, but separate from Special guest appearance. Special guest stars are payed on a higher scale than guest stars, but on a lower scale than guest appearances.

The special guest star is listed after the guest cast in season one, but before the guest cast in all other seasons. The credit is used in every season except Season 2.

Special guest stars on 24

Season 1

Actor and Character	Picture	Notes
Penny Johnson Jerald as Sherry Palmer		De facto cast.

Carlos Bernard as Tony Almeida		De facto cast.

Richard Burgi as Kevin Carroll		Originally cast as Jack Bauer but moved to the role of Kevin Carroll once Kiefer Sutherland joined the project.

with Lou Diamond Phillips as Mark DeSalvo		Friend of Kiefer Sutherland and movie star.

and Dennis Hopper as Victor Drazen		Two time Academy Award nominee.

Season 3

Actor and Character	Picture	Notes
Penny Johnson Jerald as Sherry Palmer		Returning member of the main cast.

Season 4

Actor and Character	Picture	Notes
Carlos Bernard as Tony Almeida		Returning member of the main cast.

and Reiko Aylesworth as Michelle Dessler		Returning member of the main cast.

Season 5

Actor and Character	Picture	Notes
Sean Astin as Lynn McGill		Motion picture star. Upgraded from guest star after six episodes.

William Devane as James Heller		Returning member of the main cast.

Elisha Cuthbert as Kim Bauer		Returning member of the main cast.

Reiko Aylesworth as Michelle Dessler		Returning member of the main cast.

Season 6

Actor and Character	Picture	Notes
Powers Boothe as Noah Daniels		Motion picture star.

James Cromwell as Phillip Bauer		Academy Award nominee.

Kim Raver as Audrey Raines		Returning member of the main cast.

Gregory Itzin as Charles Logan		Returning member of the main cast.

William Devane as James Heller		Returning member of the main cast.

Jean Smart as Martha Logan		Returning member of the main cast.