I am looking for a scary/hooror movie I saw in the late 1970's-early 1980's either on Showtime/HBO about this guy in a coma in a hospitaland this nurse is recruited to sit and watch him at night and during the day when she goes home during the days-through his mind power does scary things to her and types messages to her through mind-power on a typwriter. I thought the name was "Freddie" but I can't locate it anywhere. Where should I try-??