City on Fire
The Night the Bridge Fell down
Both from the late 70s/very early 80s, and both staring Leslie Neilson! Watched them both as a kid and loved them. It's nigh on impossible to find much about either on the Internet, although there are a couple of clips of City on Fire. If I watched them again now I would probably be majorly disappointed, as I've built them up in my head to be the best things ever! But then again, anything staring Leslie is fine with me.
Also another one - a woman kills her sister and husband by cutting the brake line in the car, so that she can bring up their baby as her own. As the lad grows up she goes mad, starts killing people, and cuts all her hair off. Now, if anyone can tell me the name of that TV movie, I'd be eternally grateful!!!