Main characters

This is a list of main characters on 24. A main character is defined as having the actor who portrays the role listed in the opening credits before the guest stars. Additional major recurring characters who appeared in at least half of a season are also listed, as well as former main characters who returned in later seasons.

Jack Bauer is the only character to appear in every episode of the series.

Season 1

 * Kiefer Sutherland as Jack Bauer
 * Leslie Hope as Teri Bauer
 * Sarah Clarke as Nina Myers
 * Elisha Cuthbert as Kim Bauer
 * and Dennis Haysbert as David Palmer

Season 2

 * Kiefer Sutherland as Jack Bauer (All Episodes)
 * Sarah Wynter as Kate Warner(All Episodes)
 * Elisha Cuthbert as Kim Bauer (all except 2.19 and 2.20)
 * Penny Johnson Jerald as Sherry Palmer (episodes 2.06 to 2.14, 2.21 to 2.24 only)
 * Carlos Bernard as Tony Almeida (All Episodes)
 * Xander Berkeley as George Mason (episodes 2.01 to 2.15 only)
 * and Dennis Haysbert as President David Palmer (All Episodes)

Season 3

 * Kiefer Sutherland as Jack Bauer
 * Elisha Cuthbert as Kim Bauer
 * Carlos Bernard as Tony Almeida
 * Reiko Aylesworth as Michelle Dessler
 * James Badge Dale as Chase Edmunds
 * and Dennis Haysbert as President David Palmer

Season 4

 * Kiefer Sutherland as Jack Bauer (All Episodes)
 * Kim Raver as Audrey Raines (All Episodes)
 * Alberta Watson as Erin Driscoll (episodes 4.01 to 4.12 only)
 * Lana Parrilla as Sarah Gavin (episodes 4.01 to 4.08 & 4.10 to 4.13 only)
 * Roger Cross as Curtis Manning (all except 4.16 and 4.17)
 * and William Devane as James Heller (episodes 4.01 to 4.14; 4.22)

Season 5

 * Kiefer Sutherland as Jack Bauer
 * Kim Raver as Audrey Raines (all except 5.20)
 * Mary Lynn Rajskub as Chloe O'Brian
 * Carlos Bernard as Tony Almeida (episodes 5.01; 5.05; 5.11; 5.12; 5.13; 5.14 only)
 * Gregory Itzin as President Charles Logan (all except 5.15)
 * James Morrison as Bill Buchanan (all except 5.17)
 * Roger Cross as Curtis Manning (all except 5.06; 5.12; 5.17; 5.18; 5.20; 5.23; 5.24)
 * Louis Lombardi as Edgar Stiles (episodes 5.01 to 5.13)
 * and Jean Smart as Martha Logan (all except 5.15)

Season 6

 * Kiefer Sutherland as Jack Bauer
 * Mary Lynn Rajskub as Chloe O'Brian
 * DB Woodside as President Wayne Palmer (all except 6.13; 6.19 to 6.21)
 * James Morrison as Bill Buchanan (all except 6.20)
 * Peter MacNicol as Tom Lennox
 * Jayne Atkinson as Karen Hayes (all except 6.08 to 6.11; 6.13; 6.21)
 * Carlo Rota as Morris O'Brian
 * Eric Balfour as Milo Pressman (all except 6.11 to 6.12)
 * Marisol Nichols as Nadia Yassir
 * and Regina King as Sandra Palmer (6.02 to 6.07; 6.14 to 6.16 only)