This is a fun one for all the sci-fi nerds out there. Just let me emphasize that, by "fun," I don't mean "good."
Timestalkers is a cheesy 1987 made-for-TV movie about a history professor and Old West hobbyist (William Devane, almost completely miscast) who, after the death of his wife and son (the boy from Who's the Boss), finds himself recruited by a time-travelling fashion model (Lauren Hutton, sadly wearing a cap over her tooth-gap) to help her stop the assassination of some 19th century person to further the vague career goals of her deranged, homicidal ex-colleague (Klaus Kinski, looking like Doc Brown's psycho brother).
Kinski and Hutton alternately employ unnecessarily gaudy time-travel technology to make the plot appear to develop. Even before this, however, we are treated to "flashbacks" from Devane's antiquing road trips that depict what Kinski is (simultaneously?) doing in the Old West. The part that's by turns endearing and irritating is that each flashback is accompanied by an explosive screen effect and the stolen sound of a TIE fighter cannon firing.