Mark Tymchyshyn is Phil Tatola in The Stand-In (Season 5 - Episode 16).
Marty Rackham is a police officer in The Trip: Part 2 (Season 4 Episode 2), and Jake Jarmel in other three episodes. The first The Sniffing Accountant (Season 5 Episode 4).
Marvin Braverman appears in The Handicap Spot (Season 4 Episode 22) and in The Opposite (Season 5 Episode 22).
Matt McCoy is Lloyd Braun in The Gum (Season 7 Episode 10) and in The Serenity Now (Season 9 Episode 3).
Michael Chiklis is a Steve Pocatello in The Stranded (Season 3 Episode 10).
Michael Costanza is Truck Driver in The Parking Space (Season 3 - Episode 21).
Michael D. Roberts is Roger Ipswich, Peterman's accountant in The Chicken Roaster (Season 8 - Episode 8).
Michael Des Barres is restaurateur in The Smelly Car (Season 4 Episode 21).
Michael Fairman is Mr. Penske (the owner of Penske file) in The Barber (Season 5 - Episode 8).
Michael James McDonald is Jesse in The Wig Master (Season 7 - Episode 18) and Player in The Understudy (Season 6 - Episode 23).
Michael McShane is Franklin Delano Romanowski in The Betrayal (Season 9 Episode 8).
Michael Milhoan is the security guard in The Stranded (Season 3 Episode 10).
Michael Mitz is Phone Guy in The Chinese Restaurant (Season 2 Episode 11) and Photographer in The Puffy Shirt (Season 5 Episode 2).
Michael Richards is a Cosmo Kramer in 170 episodes. In fact, he appears in all but two episodes: The Chinese Restaurant (Season 2 Episode 16) and The Pen (Season 3 Episode 3).
