Jeffrey Charles William Michael Conaway (October 5, 1950 – May 27, 2011) was an American actor. He portrayed Kenickie in the film Grease and had roles in four television series: struggling actor Bobby Wheeler in Taxi (1978–1982), Prince Erik Greystone in Wizards and Warriors, security officer Zack Allan on Babylon 5, and Howard Griffin on Murder, She Wrote. Conaway was featured in the first and second seasons of the reality television series Celebrity Rehab with Dr. Drew.