Whispering Smith - Season 1 Episode 26 Hired to Die
Overview: A not-so-devoted husband hires a Kansas City killer to travel to Denver to murder his wife when the couple arrive by stagecoach several days later. After the young woman dies, he sets about arranging for his mother's return to England after an absence of 14 years. The older woman, however, becomes suspicious of her doting "son's" true identity.