Jeff Conaway In Coma After Overdose By Tracie Egan Morrissey | May 19, 2011 | 6:40pm Latest Copy to clipboard × Copy Link Facebook Reddit Bluesky 0 Jeff Conaway—known for his roles in Taxi, Grease, and most recently Celebrity Rehab—is in a coma and listed in critical condition following a drug overdose of pain pills on May 11. Join the discussion... Keep scrolling for more great stories.