I don't get the Mystery Channel either (as a matter of fact, never heard of it), but Sci-Fi does run Night Gallery every few years.
I do remember that episode - creepy! While Night Gallery wasn't up to the caliber of Twilight Zone (something that caused constant tension between Rod Serling and the show's producers, since although his input was important, he did not have creative control), but it did have some frightfully wonderful segments. The first one (not the pilot, meaning the one with the Joan Crawford-starring, Steven Spielberg-directing story) with Carl Betz of Donna Reed/Judd for the Defense fame, was an especial chiller. He played a scientist who learned how to use suggestive hypnosis to make a man appear afflicted with any disease, and then used a rapping signal to bring him out of the spell. He took it to the ultimate, making his assistant dead, but able to resurrect him with the pre-agreed rapping. Unfortunately, he forgot the proper signal until long after the dead man was buried. Betz's wife-character (who was having an affair with the assistant), discovered the correct signal sequence and went to the grave (where the corpse was already in an advanced state of decomposition) and rapped correctly on the casket..............the result showing that the experiment was successful in the end. I'm getting goose-bumps just remembering that climactic, final scene!
Gerard