I'm the Girl He Wants to Kill (1974)

I'm The Girl He wants to Kill (UK, 1974) (Thriller Episode 2/ Season 3)
starring: Julie Sommars, Robert Lang and Anthony Steel

Thriller is a British television series, originally broadcast in the UK from 1973 to 1976. It is an anthology series: each episode has a self-contained story and its own cast. As the title suggests, each story is a thriller of some variety, from tales of the supernatural to down-to-earth whodunits
via IMDB
there is a special article here