A grieving father (Philip Abbott of "The F.B.I.") goes to live with his sister after his wife is killed in an accident. He distances himself from his daughter -- who hears voices upstairs in a room in the house they're now living in.
The butler says no one is there. The aunt gives the little girl three dolls -- and it turns out that three girls were killed in the house due to leaking gas, and begin to comfort the girl -- and even teach her "The Charleston" (having lived in the 20s). The scene where the aunt "feels" the girl sent shrivers down my back.
Excellent episode -- one of the best I've seen.