Ending up on different sides just prior to the Battle of Gettysburg, Doug and Tony must stop an attempt by Machiavelli (who had traveled in time from the Renaissance due to the Time Tunnel Project) from trying to affect the outcome of the battle and send him back into time.

Cast: James Darren, Robert Colbert, Whit Bissell, Malachi Throne, John Crawford, John Zaremba, Kevin Hagen, Kevin O'Neal, Lee Meriwether