Darrell Kunitomi is Lab Technician in The Non-Fat Yogurt (Season 5 Episode 7).

Daryl Keith Roach is Blind Violinist in The Subway (Season 3 - Episode 13).

Dave Florek is Harry in The Strike (Season 9 Episode 10).

David Blackwood appears in seven Seinfeld episodes. The first: The Robbery (Season 1 - Episode 3).

David Brisbin is Hand Model Client in The Puffy Shirt (Season 5 Episode 2).

David Byrd is Roger Hoffman, the pharmacist in The Sponge (Season 7 Episode 9) and in The Finale (Season 8 Episodes 23-24).

David Chandler is Brian in The Yada Yada (Season 8 - Episode 19).

David Ciminello is Gino in The Barber (Season 5 Episode 8).

David Dunard is Security Guard in The Parking Garage (Season 3 Episode 6) and Rage-aholics leader in The Apology (Season 9 Episode 9).

David Fresco is Isaac in The Pony Remark (Season 2 Episode 2).

David Graf is Cop in The Ticket (Season 4 Episode 4).

David James Elliott is Carl in The Couch (Season 6 Episode 5).

David Labiosa is Antonio in The Busboy (Season 2 Episode 12).

David Letterman is Himself in The Abstinence (Season 8 Episode 9).

David Mandel is Frolf Player in The Summer of George (Season 8 Episode 22).

David Moreland is Mr. Parry in The Slicer (Season 9 - Episode 7).

David Moscow is Lomez Jr. in The Van Buren Boys (Season 8 - Episode 14).

David Naughton is Dick in The Red Dot (Season 3 Episode 12).

David Purdham is Dr. Resnick in The Package (Season 8 Episode 5).

David Richardson is Customer in The Barber (Season 5 Episode 8).

David Sage is Dr. Dembrow in The Wallet (Season 4 Episode 5).

David St. James is Doctor in The Secret Code (Season 7 Episode 7).

David Tress is Mr. Cohen in The Chinese Restaurant (Season 2 Episode 11).

Dawn Arnemann is Monica in The Cafe (Season 3 Episode 7).

Dayna Winston is Carol in The Virgin (Season 4 Episode 10).

Dayton Callie is Cabbie in The Puerto Rican Day (Season 9 - Episode 20).

De Dee Pfeiffer is Victoria in The Opposite (Season 5 Episode 22).