Bryant Gumbel is himself in The Puffy Shirt (Season 5 - Episode 2).

Bunny Summers is Old Woman in The Muffin Tops (Season 8 Episode 21).

C.E. Grimes is a Martin in The Suicide (Season 3 Episode 15).

C.K. Steefel is Kramer's Girlfriend in The Keys (Season 3 Episode 22) and Sylvia in The Cigar Store Indian (Season 5 Episode 10).

Cameron is Sexy Woman in Restaurant in The Fix Up (Season 3 - Episode 16).

Candice Bergen is a herself in The Keys (Season 3 Episode 22).

Carl Banks is Policeman #1 in The Andrea Doria (Season 8 Episode 10).

Carl LaBove is Steve in The Kiss Hello (Season 6 Episode 17).

Carlos Jacott is Ramón in The Pool Guy (Season 7 Episode 8).

Carlyle King is The Mother in The Parking Garage (Season 3 Episode 6).

Carmi Greene is Guest in The Butter Shave (Season 9 Episode 1).

Carol Ann Susi is Carrie in The Boyfriend (Season 3 - Episodes 17-18).

Carol Kane is Corinne, in The Marine Biologist (Season 5 Episode 14).

Carol Kiernan is Mother in The Merv Griffin Show (Season 9 Episode 6).

Carol Leifer appears in three Seinfeld episodes. The first is The Kiss Hello (Season 6 - Episode 16).

Carol Mansell is Mrs. Sanger in The Bubble Boy (Season 4 - Episode 7).

Carol Rosenthal is Ticket Clerck #1 in The Implant (Season 4 Episode 19).

Cary Elwes is David, Beth Lookner’s husband in The Wait Out (Season 7 Episode 23).

Catherine Keener is Nina West in The Letter (Season 3 Episode 20).

Cathy Cahlin Ryan is Hippie Girl in Van in The Keys (Season 3 Episode 22).

Cathy Lind Hayes is Woman Behind Elaine in The Movie (Season 4 Episode 14).

Chaim Jeraffi is the Jiffy Park Guy in The Wig Master (Season 7 Episode 18) and the Jiffy Dump Guy in The Muffin Tops (Season 8 Episode 21).

Charles Cyphers is Gardner in The Hot Tub (Season 7 Episode 5).

Charles Emmett is Orderly in The Seven (Season 7 Episode 13).

Charles Kahlenberg is McAdam in The Comeback (Season 8 Episode 13).

Charles Levin is The Mohel in The Bris (Season 5 Episode 5).

Charlotte Lewis is Nina in The Switch (Season 6 Episode 11).