I started following the films of lesser-known horror star George Zucco, a British actor who tended to play incredibly calm villains. Fog Island (1945) is a revenge thriller, where he invites his former business associates (those who betrayed him) to his isolated home on a foggy island. It's definitely a low budget film, but somehow that works in its favour. There's a few great scenes amidst the fogginess (e.g. scenes in a specially-designed "death room"). George Zucco was actually a good actor - here playing a buttoned-down Englishman whose demeanour is ready to crack at any moment due to barely-concealed rage.