Mark Linn-Baker (b. 1954) is an American actor and director, best known for starring on the sitcom Perfect Strangers. He also had a recurring role on the 2009 revival of The Electric Company as Uncle Sigmund Scrambler. He appeared as Barkley's veterinarian in Episode 3593 of Sesame Street. Wikipedia has an article related to: Mark Linn-Baker Retrieved from "https://muppet.fandom.com/wiki/Mark_Linn-Baker?oldid=1163603" Categories: Celebrities Sesame Street Guest Stars Community content is available under CC-BY-SA unless otherwise noted.