Question Author
That's it!
'Lost Hearts'!!!
Thank you all for your responses. At least now I know I wasn't imagining things.
It truy scared the bejesus out of me, and now I know why....I always assumed that it was broadcast at the end of the 70s, which would've made me a teenager....and a wuss. Now I know I must've seen it in 73/74 which meant I would've only been eight years old at the most.
God only knows what my mum was thinking, letting me watch something as disturbing as that...?