God Forgives... I Don't!(1967) Link

When (Spencer), an investigator for the insurance company, realizes San Antonio is actually alive and sitting on a fortune in stolen gold, he tracks down Cat. The two form a reluctant, often tense partnership to find the hidden loot and settle old scores. Gritty Atmosphere vs. Slapstick Comedy

The story kicks off with a haunting visual: a train rolls into a station, but no one gets off. Every passenger has been massacred. The man behind the bloodbath is the psychotic bandit (played with menacing glee by Frank Wolff), who was supposedly killed a year earlier in a duel with the sharp-shooting Cat Stevens (Hill). God Forgives... I Don't!(1967)

While they would go on to star in nearly 20 films together, this first outing is a far cry from their later "buddy comedy" persona. The Plot: Revenge, Gold, and a "Dead" Man When (Spencer), an investigator for the insurance company,