Just watched Quatermass and the Pit
It was a 1958/59 B&W BBC TV serialisation in 6 parts -stuck together end-to-end in this YouTube video (3hrs 27mins.).
The sound synchronisation goes off a bit in the last couple of parts, but not so as you'd fail to get the plot.
It's rather good SF and ties together science, fiction, archaeology, ghosts, devils, poltergeists, aliens, black magic, telekinesis, bad acting, over-acting, the works. The end culminates in the commencement of a rapidly-spreading contagious mass racial purging (killing) of all those people in London and beyond who don't think the same and who use irony in their jokes. Well, iron comes into it, at any rate.
I saw this years ago in an old colour movie remake: Quatermass and the Pit (1967)
- but I think the old BBC series might have been a bit better!
Well worth a watch: