Courteney Cox is Maryl Seinfeld in The Wife (Season 5 Episode 17).
The Secretary (Season 6 Episode 9).
Courtney Taylor is Attractive Applicant in
The Parking Garage (Season 3 Episode 6).
Cynthia Ettinger is Michele in
The Mom and Pop Store (Season 6 Episode 8).
Dan Frischman is Man on the Phone in
The Subway (Season 3 - Episode 13).
Dan Studney is Man fighting with Kramer over newspaper in
The Doodle (Season 6 Episode 19).
Dana Wheeler-Nicholson is Shelly in
Daniel von Bargen is Mr. Kruger in 4 episodes. The first: The Slicer (Season 9 Episode 7).
The Cadillac (Season 7 Episode 14).
Daniel Zacapa is John Hanaran, The Power Guy in
Danny Woodburn is Mickey Abbot in seven episodes. His first appeareance was in The Stand-In (Season 5 Episode 16).