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.

After a meteor strike and some scientific mumbo-jumbo, Felix Menzies wakes up in a jail cell on the day before his execution for murdering the man he wrongly thought was his wife’s lover—an act he doesn’t remember—, and then he starts waking up on each previous morning, whereupon he begins to think he can cheat Destiny by not murdering the guy in the first place.

This version of Twain’s story borrows some sf tropes from Shelley’s Frankenstein (a mad scientist) and Kipling’s “Wireless” (recovering sound from the past), although all that is small potatoes next to Will Rogers’ folksy wit. His character—Hank “Martin—is tossed back to Camelot when a bolt of lightning and a suit of armor knock him over at the mad scientist’s lab, and at the end, he returns via a similar timeslip. In between, we get one-liners, tommy guns, tanks, cars, characters that are eerily familiar from Martin’s present-day life—and a lot of time to debate whether this version has a real timeslip or is just a dream.

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.

In the year 2035, with the world devastated by an artificially engineered plague, convict James Cole is sent back in time to gather information about the plague’s origin so the scientists can figure out how to fight it.