Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Derek McGrath (born June 4, 1951 in Timmins, Ontario) is a Canadian actor. He is known for his roles in Cheers as "Andy-Andy" Schroeder (the would-be strangler of one Diane Chambers), Dr. Benjamin Jeffcoate in My Secret Identity, Crewman Chell in Star Trek: Voyager, and as Dr. Derek Hebert in Doc. McGrath also played Buck the dog in a fantasy sequence in a second season episode of Married... with Children and a mutant in the 1993 comedy film Freaked. He most recently appeared in a recurring role as the character of Anglican priest Duncan Magee in the CBC Television sitcom Little Mosque on the Prairie seasons 1-3; in season 4 (beginning late September 2009), he appears to have been written out and replaced with a younger priest played by actor Brandon Firla. He voices Spiff in the animated children's series Iggy Arbuckle.