Guest Stars Jeff Conaway as Zack Allan Richard Moll as Max Wanda De Jesus as Sarah Bernie Casey as Derek Cranston Tony Steedman as Dr. Everett Jacobs Co Starring Josh Coxx as David Corwin Ardwight Chamberlain voices Kosh Naranek Bryan Michael McGuire as Guard Robert Silver as Merchant Damon C. Reiser as Lurker Debby Shively as Aide