Mariska Hargitay is Melissa Shannon in The Pilot (Season 4 Episodes 23-24).
Mark Beltzman is Bob, a chef and a suit buyer in The Pie (Season 5 Episode 15).
Mark Boone Junior is OTB Patron in The Subway (Season 3 - Episode 13).
Mark Christopher Lawrence is the the skycap in The Airport Season 4 Episode 12).
Mark Larson is Vargas, the Bizarro Newman in The Bizarro Jerry (Season 8 Episode 3).
Mark Metcalf is Bob Cobb, a.k.a The Maestro in The Maestro (Season 7 - Episode 3) and in The Doll (Season 7 - Episode 16).
Marla Sucharetza is Nancy Klopper in The Fusilli Jerry (Season 6 - Episode 21).
Marlee Matlin is Laura, a tennis lineswoman. She appears in The Lip Reader (Season 5 Episode 6).
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).
Mary Jo Keenen is Deena Lazzari in three episodes. The first is The Gum (Season 7 - Episode 10).
Maryedith Burrell is Maryedith in The Non-Fat Yogurt (Season 5 Episode 7).
Matt McCoy is Lloyd Braun in The Gum (Season 7 Episode 10) and in The Serenity Now (Season 9 Episode 3).
