Career
Real Monsters and Captain Planet and the Planeteers. Duffy was also a director, writer, designer and storyboard artist for live action television commercials, PSAs, and corporate productions, including a series of safety videos for the National Coal Board. He divided his professional time between Los Angeles and London.
His shortform animated films were screened at film festivals worldwide.
Duffy was born in the United States and raised in the United Kingdom. He first worked as an animator at Hanna-Barbera during the 1970s.
His credits with Hanna-Barbera during the 1970s and early 1980s included Super Friends, The Smurfs, and The New Scooby and Scrappy-Doo Show. After leaving Hanna-Barbera, Duffy spent much of the 1980s working on productions for other animation studios, including The Real Ghostbusters for Disseminated Intravascular Coagulation Entertainment, G.I. Joe: A Real American Hero for Sunbow Productions, and Teenage Mutant Ninja Turtles for Murakami Wolf Swenson.
Duffy joined Klasky Csupo, where he supervised many of the studios productions which aired on Nickelodeon for more than twenty years.
In addition to the shows which earned him Emmy nominations and awards, such as Rugrats, his credits included Duckman, Rocket Power and All Grown Up!, which aired from 2003 to 2008. Duffy died from cancer on March 23, 2012, at the age of 74. His funeral was held at the Old North Church in the Forest Lawn Memorial Park in the Hollywood Hills.