Lancelot

We may never see this first movie adaptation of Twain’s story, since only three of the eight silent reels are known to still exist. The Yankee in this version is Martin Cavendish, who after reading Twain’s book, is knocked on the head by a burglar and slips into the time of Camelot. The result is high comedy coupled with a romantic interest and replete with motorcycles, explosions, Model T Fords, telephones, indoor plumbing, and lassos at a jousting tournament. As we did for Twain’s original, we classify the story as science fiction for the Yankee’s attempts at bringing modern technology to the distant past. And yes, the hero predicts a solar eclipse to save his life.

One review at Silent Hollywood indicates that the ending has Martin awakening from a dream and there is no explicit mention of actual time travel. With this in mind, we’re marking the time travel as debatable. Oh, and Mark Twain himself appears in the film, played by Karl Formes. —Michael Main

Bing Cosby’s delightful portrayal of the Yankee Hank Martin (why not Morgan?!) begins in 1912 after he’s already returned from Camelot. He’s just traveled to England and sought out the very castle of his 6th-century musical adventures, where he proceeds to tell his story to the master of the castle.

Based on Hank’s knowledge of the castle and its displays, the time travel definitely occurred in this version, with both the travel back and travel forward caused by clonks on the head. And based on the ending, Hank might not have been the only traveler through time. —Michael Main

Although the story is not about time travel, the characters do spend the first couple of pages reminiscing about their disappointing experiences with a time machine. —Fred Galvin

When Katherine Davidson falls into an underground ice cave beneath Stonehenge, she finds that Merlin and his lover Niniane have been trapped there for a millennium, whereupon Merlin and Niniane proceed to show Katherine the story of how Morgan le Fay trapped them. —Michael Main