<P> The family head outside, with Rocky and Ruby Sue believing they see Santa Claus in the distance . Clark tells them it's actually the Christmas Star and that he finally realizes what the holiday means to him . Uncle Lewis says the light is coming from the sewage treatment plant; reminding Clark that Eddie had been dumping his sewage into a storm drain . Before Clark can stop him, Uncle Lewis tosses a lit match, triggering an explosion . Aunt Bethany starts singing "The Star - Spangled Banner" and the whole family and the SWAT team join in, gazing at Clark's Santa Claus and reindeer set burning and flying into the distance . The entire family and the SWAT team members then celebrate inside the house, while Clark and Ellen happily share a Christmas kiss . </P> <Ul> <Li> Chevy Chase as Clark W. "Sparky" Griswold, Jr . </Li> <Li> Beverly D'Angelo as Ellen Griswold </Li> <Li> Juliette Lewis as Audrey Griswold </Li> <Li> Johnny Galecki as Rusty "Russ" Griswold </Li> <Li> John Randolph as Clark W. Griswold, Sr . </Li> <Li> Diane Ladd as Nora Griswold </Li> <Li> E.G. Marshall as Art Smith, Ellen's Dad </Li> <Li> Doris Roberts as Frances Smith, Ellen's Mom </Li> <Li> Randy Quaid as Cousin Eddie </Li> <Li> Miriam Flynn as Cousin Catherine </Li> <Li> Cody Burger as Rocky, Eddie and Catherine's son </Li> <Li> Ellen Hamilton Latzen as Ruby Sue, Eddie and Catherine's daughter </Li> <Li> William Hickey as Uncle Lewis </Li> <Li> Mae Questel as Aunt Bethany </Li> <Li> Sam McMurray as Bill </Li> <Li> Nicholas Guest as Todd Chester, a Griswold neighbor </Li> <Li> Julia Louis - Dreyfus as Margo Chester, a Griswold neighbor </Li> <Li> Brian Doyle - Murray as Frank Shirley </Li> <Li> Natalia Nogulich as Helen Shirley </Li> </Ul> <Li> Chevy Chase as Clark W. "Sparky" Griswold, Jr . </Li> <Li> Beverly D'Angelo as Ellen Griswold </Li>

Who plays the boss in national lampoon's christmas vacation