No takers!! it was The Gemini Man (1976) loosely based on the invisible man premise.
The series stars Ben Murphy as secret agent Sam Casey, who was injured in a diving accident which rendered him invisible. The agency, called INTERSECT, found a way to control his invisibility by the use of a wrist watch, referred to as a "DNA stabilizer". Pressing a button on the watch would make him invisible, which was a helpful tool in his line of work. He could however, only do this for 15 minutes per day or else he would become permanently invisible. I used to like it..
Intro
Try this easier one then you lot;