Boris Karloff assures us that each episode "…is a thriller" as a matter of routine, but this one actually delivers. I'm not exactly sure why it works so well. Perhaps the chills are based merely on the knowledge that one is not alone in a dark house--because at that point, it really doesn't matter if the noises are caused by ghosts or by greedy cousins. Or maybe the fearless bravado displayed by Duncan Corey (portrayed by Rip Torn) works to intensify our own concern for his safety. In any case, the suspense is gripping.
After a few twists near the end, the conclusion is somewhat expected. But following such spine-tingling suspense, the ending is not so much anticipated as it is satisfying.