S1·E23 Pirates of Deadman's Island

Doug and Tony arrive on the Spanish Main on April 1805, where they are captured by Captain Beal and his crew. They befriend Armando, a young boy who claims to be the nephew of the King of Spain. Tony eventually manages to escape where he is found by the attacking British who are unwilling to try and help Doug and Armando. Beal tries to kill Doug but is whisked back to Project Tick-Tock. He takes Anne hostage but eventually goes back into the Tunnel and his own time. The Project staff use the Tunnel to whisk Doug and Armando out of trouble after Beal is killed by his henchman. However, the two are caught in a bombardment and seriously wounded. A doctor friend of Kirk's due for retirement, Berkhart, volunteers to go back despite the fact he has no chance of being returned. He saves Doug and Armando before the travellers are whisked away.