This is an original script from the episode "The Leap Back", the episode where after a lightning strike, Sam and Al have switched places, with Al stuck in the year 1945 as an ex-POW returning from WWII and Sam confined to the Imaging Chamber which has been locked by mistake. Al must find a way to keep his host's old girlfriend from marrying someone else and Sam must get the Imaging Chamber door open so that he can save Al...and return to his lost love.
