Jeff Daniels Tim O'Hara Elizabeth Hurley Brace Channing Daryl Hannah Lizzie Christopher Lloyd Uncle Martin (The Martian) Wallace Shawn Dr. Elliott Coleye Christine Ebersole Loralie Brown Michael Lerner Mr. Channing T.K. Carter Lenny Wayne Knight Zoot, Martin's Talking Space Suit (Voice) Ray Walston Armitan Shelley Malil Felix Dawn Maxey Salesgirl Steven Anthony Lawrence Nurplex Kid Michael Chieffo Earl Metz Troy Evans Captain Dalton Arthur Senzy Cmdr. Murdoch Charles Rahi Chun Radar Controller Michael Dempsey Van Gundy David St. James Prescott Lorin McCraley Cool Dude Tom Hallick Howard Greenly Barry Pearl News Director Buck Kartalian Muscle Man Steve Bond The Seti Group Driver Sylvester Terkay Huge Guard Michael Bailey Smith Big Guard Christian Keiber Guard at Clearing Debra Christofferson Mrs. Butz Jeff Daniels Tim O'Hara Elizabeth Hurley Brace Channing Daryl Hannah Lizzie Christopher Lloyd Uncle Martin (The Martian) Wallace Shawn Dr. Elliott Coleye Christine Ebersole Loralie Brown Michael Lerner Mr. Channing T.K. Carter Lenny Wayne Knight Zoot, Martin's Talking Space Suit (Voice) Ray Walston Armitan Shelley Malil Felix Dawn Maxey Salesgirl Steven Anthony Lawrence Nurplex Kid Michael Chieffo Earl Metz Troy Evans Captain Dalton Arthur Senzy Cmdr. Murdoch Charles Rahi Chun Radar Controller Michael Dempsey Van Gundy David St. James Prescott Lorin McCraley Cool Dude Tom Hallick Howard Greenly Barry Pearl News Director Buck Kartalian Muscle Man Steve Bond The Seti Group Driver Sylvester Terkay Huge Guard Michael Bailey Smith Big Guard Christian Keiber Guard at Clearing Debra Christofferson Mrs. Butz