Will be watching Death Line (1972), aka Raw Meat, starring Donald Pleasence, Norman Rossington and a walk-on from Christopher Lee (he only agreed to do it so long as he didn’t have to wear a set of false teeth!). Got it on remastered on blu-ray, but the audio is only mono.
In a nutshell: a politician goes missing on the London underground and the subsequent investigation uncovers a link with a gruesome past tragedy.
Underrated British horror and Pleasence, as the irascible Inspector Calhoun, is having a great time.