What in the world. You just gave me a flashback of remembering seeing the video cover at the VHS rental place when I was a small kid and thinking that movie looked super cool. Never ended up seeing it though.
I'm almost certain there was more than one episode of Remo Williams. But all I can remember is Roddy McDowall as a martial arts guru of some sort, and Remo using the spray from a water hose to get off the roof of a building.