freaking hilarious.
What the British humour? But knowing you, you're talking about the FX.
You forget, that classed as "special effects" back then, and people believed it. It WAS Scary because people were actually bothered by the creatures. It was done in a way that seemed real, but also was very eccentric. It wasn't too heavy (Star Trek) but wasn't too jokey (Red Dwarf...Which I like).
You forget, the shows golden period (Tom Baker and Peter Davison was from Early 70s to Mid 80s). That was about 20 years ago.