The Ghost & Mrs. Muir (1968)

S1E24 The Medicine Ball

When Carolyn falls ill, Captain Gregg grows frustrated with the doctor’s care and decides to create his own cure. This homemade remedy unexpectedly transports Mrs. Muir back to the mid-1800s, where she finds herself as a "ghost," visible only to the living Captain. As they navigate this unusual situation, the two must confront the challenges of their unique bond across time.