Maverick (1957)

S4E23 Flood's Folly

In the outskirts of Denver, Beau and his friend Judge Scott seek refuge from a fierce blizzard at the residence of Martha Flood and her niece, Sally. Unbeknownst to them, Martha and the judge are scheming to have Sally committed so they can seize her inheritance. Meanwhile, Martha's lover, Chet Whitehead, a hired assassin, has his own deadly intentions, plotting to eliminate Sally, the judge, and Maverick.