Hammer House of Horror (1980)

S1E11 Visitor from the Grave

Charlie Willoughby attempts to assault Penny, a troubled young American residing in England, but in an act of self-defense, she fatally shoots him. With the help of her boyfriend, Harry, Penny hides the evidence by burying Charlie's body in the woods. However, Penny begins to believe she can hear and see Charlie, seemingly alive. Unbeknownst to her, a mischievous presence is at play, with its own agenda that involves Penny.