Season 1 (2000–01) •
Jorja Fox (
Sara Sidle) joined the main cast in the second episode ("Cool Change"). •
Eric Szmanda (
Greg Sanders),
Robert David Hall (Al Robbins), and
David Berman (
David Phillips) all had continuous arcs throughout the whole season.
Season 2 (2001–02) Season 3 (2002–03) •
Eric Szmanda (
Greg Sanders) and
Robert David Hall (Dr. Al Robbins) were promoted to the main cast as of this season. •
Wallace Langham (
David Hodges) had a continuous arc starting with the eleventh episode, "Recipe for Murder".
Season 4 (2003–04) Season 5 (2004–05) •
Louise Lombard (
Sofia Curtis) and
Jon Wellner (
Henry Andrews) both had continuous arcs throughout the whole season.
Season 6 (2005–06) •
Liz Vassey (
Wendy Simms) had a continuous arc starting with the sixth episode ("Secrets and Flies").
Season 7 (2006–07) •
Louise Lombard (
Sofia Curtis) was promoted to the main cast as of this season, and then she leaves the show after the season finale ("Living Doll"). •
David Berman (
David Phillips),
Wallace Langham (
David Hodges),
Jon Wellner (
Henry Andrews), and
Liz Vassey (
Wendy Simms) all had continuous arcs throughout the whole season.
Season 8 (2007–08) •
Wallace Langham (
David Hodges) was promoted to the main cast as of this season. •
Jorja Fox (
Sara Sidle) departed the show after the seventh episode, "Goodbye & Good Luck".
Season 9 (2008–09) •
Gary Dourdan (
Warrick Brown) departed the series after the season premiere, "For Warrick". •
William Petersen (
Gil Grissom) left the show after the tenth episode, "One to Go". •
Laurence Fishburne as (
Raymond Langston) was introduced in the ninth episode, "19 Down...", and was later promoted to the main cast in the eleventh episode, "The Grave Shift".
Season 10 (2009–10) •
David Berman (
David Phillips) and
Liz Vassey (
Wendy Simms) were promoted to the main cast as of this season. Liz Vassey departed in the season finale. ("Meat Jekyll"). •
Jorja Fox (
Sara Sidle) and
Jon Wellner (
Henry Andrews) both had a continuous arc throughout the whole season.
Season 11 (2010–11) •
Jorja Fox (
Sara Sidle) rejoins the main cast as of this season. •
Laurence Fishburne (
Raymond Langston) departed the series after the season finale "In a Dark, Dark House".
Season 12 (2011–12) •
Ted Danson (
D.B. Russell) and
Elisabeth Harnois (Morgan Brody) join the cast. •
Marg Helgenberger (
Catherine Willows) departed the show in episode 12, "Willows in the Wind". •
Elisabeth Shue (
Julie Finlay) was promoted to the main cast in the fourteenth episode ("Seeing Red").
Season 13 (2012–13) •
Jon Wellner (
Henry Andrews) was promoted to the main cast as of this season.
Season 14 (2013–14) •
Paul Guilfoyle (
Jim Brass) departed the series after the season finale ("Dead in His Tracks").
Season 15 (2014–15) •
Elisabeth Shue (
Julie Finlay) and
George Eads (
Nick Stokes) departed the series after the season finale "The End Game".
Series finale (2015) Ted Danson,
Jorja Fox,
Eric Szmanda,
Robert David Hall,
Wallace Langham,
Elisabeth Harnois,
David Berman, and
Jon Wellner star.
William Petersen and
Marg Helgenberger return.
Paul Guilfoyle guest stars in Part 1.
Notes ==Webisodes (2012)==