The Wild Wild West (1965)

S4E4 The Night of the Sedgewick Curse

While looking into the mysterious vanishing of one of James West's correspondents, the agents stumble upon an unusual family plot. West’s colleague suffered from a unique condition that accelerated aging, much like the members of the Sedgewick family. To find a cure, their family doctor has been abducting individuals with the same affliction to experiment with a serum he created. Now, it’s up to West and Gordon to put an end to his cruel experiments and ensure he faces the consequences of his actions.