Inferno - Episode 2

Lots of nifty stuff in this episode. First appearance of Venusian Karate, as the Doctor defends himself from Stahlmann. "You, sir, are a nitwit!" is one of the great all-time quotes from the show, and it's right in this episode. Good location work, very effective, well-done stunts. Olaf Pooley is stellar as the determined (and eventually infected) Stahlmann. I think the constant background sound of the drilling adds to the atmosphere.