Special Guest Stars Matt Ryan as Dr. Gwyn Davies Donald Faison as Booster Gold Guest Stars Tom Forbes as Alun Thomas Co Starring Arvind Johal as Time Policeman Michael Charrois as Prussian General Conor Stinson O'Gorman as Reece Peter Grant as Caveman #1 James R. Cowley as Caveman #2 Joel Eskildsen as Soldier #1 Dwayne Rhodes as Grizzled Soldier Luke Kuzyk as Soldier #2