I can remember barely being able to keep my eyes open watching this on a late night horror movie show, because it's not a movie for kids. Didn't realize that then, and so I always remembered it as being a pretty weak film. However, a viewing of the widescreen laserdisc version left me with a strong impression of a very fine adult feature that is more a thriller than a horror film. It lives up to the reputation of Hammer during this period, and of course that of Peter Cushing as the premier actor of the studio. Even Forrest Tucker's typical heavy-handed hamminess cannot take away from this absorbing tale of scientific endeavor clashing with crass commercialism, with a creature of an intellect that bests the men chasing it. I must say that the whole mental telepathy plot point was completely missed upon first viewing, but then I was only 10 at the time, however it now makes all the sense in the world.