Clement Blake is Edgar in The Junk Mail (Season 9 - Episode 5).

Cleto Augusto is Scott in The Label Maker (Season 6 Episode 12).

Clint Howard is Tobias Lehigh Nagy, a.k.a. The Smog Stranglerin The Trip Part 2 (Season 4 Episode 2).

Clive Rosengren is Waiter in The Race (Season 6 Episode 10) and Mr. Clothworthy in The Switch (Season 6 Episode 11).

Colin Malone is Charlie, the Sleazy Guy in The Strike (Season 9 Episode 10).

Colton James is Jimmy in The Blood (Season 9 Episode 4).

Connie Sawyer is Old Woman in The Butter Shave (Season 9 Episode 1).

Corbin Bernsen is Corbin Bernsen in The Trip (Season 4 Episodes 1-2).

Courteney Cox is Maryl Seinfeld in The Wife (Season 5 Episode 17).

Courtney Gains is Clerk in The Smelly Car (Season 4 Episode 21).

Courtney Taylor is Attractive Applicant in The Secretary (Season 6 Episode 9).

Cynthia Ettinger is Michele in The Parking Garage (Season 3 Episode 6).

Cynthia Madvig is Woman #1 in The Caddy (Season 7 Episode 12).

Cynthia Szigeti is Sherry Becker in The Library (Season 3 - Episode 5).

Dale Raoul is Dental Patient in The Note (Season 3 Episode 1).

Damian London is party guest in The Gymnast (Season 6 Episode 6).

Damon Jones is Watkins in The Maid (Season 9 Episode 19).

Dan Cortese is Tony in The Stall (Season 5 Episode 12).

Dan Frischman is Man on the Phone in The Mom and Pop Store (Season 6 Episode 8).

Dan O'Connor is Young Cop in The Bottle Deposit (Season 7 Episode 20).

Dana Gould is Fragile Frankie Merman in The Junk Mail (Season 9 Episode 5).

Dana Patrick is Model #1 in The Bizarro Jerry (Season 8 Episode 3).

Dana Wheeler-Nicholson is Shelly in The Doodle (Season 6 Episode 19).

Daniel Gerroll is Simon in The Soup (Season 6 Episode 7).

Daniel Hagen is Rick in The Dealership (Season 9 Episode 11).

Daniel von Bargen is Mr. Kruger in 4 episodes. The first: The Slicer (Season 9 Episode 7).

Daniel Zacapa is John Hanaran, The Power Guy in The Cadillac (Season 7 Episode 14).