Geiss' early TV career was spend in London scripting The David Frost Show and first joined Children's Television Workshop as a writer on the health series Feelin' Good. He also scripted television specials and revues for the likes of Dick Cavett and Bill Cosby. In the 1980s, after scripting Sesame Street Presents: Follow That Bird as his cinematic debut, Geiss and Freudberg co-wrote the Academy Award-winning Don Bluth Animated features An American Tail and The Land Before Time. Freudberg and Geiss also wrote the Screenplay for Madeline: Lost in Paris, again with Don Bluth. They won Academy Award categories include Best Original Screenplay, Best Original Score, Best Original Song and Best Picture, his first Academy Award was for Don't Eat the Pictures. He is also credited as head writer of