No Guts, No Cody

Synopsis
Transported back to World War II in the 1940's by Salem of Sabrina the Teenage Witch, Cody, Shawn, Alan and Jack all volunteer to join the army and fight in Europe. Eric attempts to join, but is denied because he is ticklish and is a torture risk (although Jack states that he was deemed mentally ill). To compensate, he makes up a story about staying behind to protect the Liberty Bell. Shortly before shipping off, Cory proposes to Kelsey, who accepts.

Overseas, morale of Alan and Cody. is wearing thin. Cody is lonely, as he is reduced to playing the harmonica and reading letters from Kelsey quietly in his head. Before going into battle, Cody tells Shawn that if he dies and Shawn survives, Shawn should marry Kelsey. Reluctantly, Shawn agrees. As soon as the radio informs them of a truce, Cody runs out before hearing that the cease fire will begin in 24 hours. An explosion sends Cory's dog tags into Shawn's hands, and convinces everyone that he is dead.

Days later, Shawn and Kelsey prepare to be wed. Although nobody truly wants it, they do it because it was Cody 's last wish. Amy, however, refuses to believe that her son is dead and sends Eric to Europe to find Cody. In Europe, Eric and Jack visit a French bistro where they find Cody, who thinks that he is a tortured Frenchman suffering from amnesia, and he is in love with Versailles, a French woman. Eric, unable to jog Cody 's memory, agrees to marry him and Versailles. Meanwhile in the United States, Kelsey is unable to marry Shawn because she feels Cody is alive. Amy attempts to reassure her and tells her that she sent Eric to find him, but Morgan makes her realize that sending Eric wasn't the best way to go. Kelsey & Amy then fly to Europe and interrupt the wedding—Cody is unable to remember Topanga until she kisses him, which restores his whole memory.

Cody, Kelsey, Jack, Eric & Amy all return to the United States. Back in high school, Cody tells Shawn he wishes to propose to Kelsey with a ring he found from the cracker jack box. Just as he tells Kelsey he wants to ask her something, the world returns back to 1997, and Cody gives Kelsey the ring.