Hart to Hart (1979)

S2E8 Ex-Wives Can Be Murder

After being presumed dead for more than a decade, Max's ex-wife unexpectedly surfaces in Los Angeles. She reaches out to Max when her friend is found murdered. While at the park, she is attacked by two thugs, leaving her injured and resulting in Max's abduction. The kidnappers make demands regarding a mysterious necklace that the Harts have no knowledge of.