He is well-known by his hero Jack Tripper of “Three’s Company”. He also played episodically in TV shows like “The Bob Newhart Show”, “The Cosby Show”, “Buffy the Vampire Slayer” and “Scrubs”.
Image via: © 2012 Gary J. Wayne
While playing his role for a TV show 11th of September 2003 Ritter complained about pain in the chest and nausea. He was taken to the hospital and was diagnosed with heart attack, he died during the surgery.