Don't remember Armchair Thrillers, but I do remember that bloody Ghostwatch thing they did when I was about 10 - like a spoof Most Haunted (possibly the same woman), in a house where this young girl was supposed to be being attacked by a ghost.
I was young, didn't realise it was a spoof, and was terrified of the creaks the house made at night for weeks!!!!
Oooh, and a Miss Marple all to do with a house that a woman had been in before as a child, but she only vaguely remembered it, and something to do with gloves and weed killer. I was very young for that and it scared me lots