Norman's Awesome Experience

A Switch in Time is a 1988 Canadian science-fiction comedy film written and directed by Paul Donovan, starring Tom McCamus, Lori Paton, Jacques Lussier and David Hemblen. It follows Norman, Umberto and Erica, a trio of accidental time travelers who attempt to rebuild their life in early Christian times during the Roman Empire's invasion of Helvetic lands.

Synopsis from Wikipedia, CC BY-SA 4.0. Everything below written here.