In the Seventies, Scooby-Doo was all about crossovers. The Harlem Globetrotters, the Three Stooges, even Don Knotts stopped by. But there's one crossover you might have forgotten.

In September of 1972, The New Scooby-Doo Movies came out with their third episode. Entitled "Wednesday is Missing", the episode had the gang get the Mystery Machine stuck in a ditch. A helpful Lurch brings the gang to the Addams mansion, where they meet Gomez, Morticia, Grandmama, and the rest of the family. When Wednesday goes missing, Scooby has to track down the wayard Addams and unmask the culprit.

This was an interesting episode for fans of The Addams Family TV show. The creepy clan looked more like the original Charles Addams cartoons than their TV counterparts. However, it wasn't a departure from the show. In fact, four members of the original cast — John Astin (Gomez), Carolyn Jones (Morticia), Jackie Coogan (Fester), and Ted Cassidy (Lurch)— all returned to reprise their roles.

Lisa Loring (Wednesday) and Ken Weatherwax (Pugsley), were reportedly too old to come back for their childhood roles, so they were replaced by Cindy Henderson and a young Jodie Foster. Yes, that Jodie Foster. She voiced Pugsley.

It turned out that this crossover was actually a sneaky pilot for the 1973 Hanna-Barbera Addams Family cartoon, which ran fewer than twenty episodes.

But there's something else different about this cartoon. If you look for it on DVD, you won't find it. Even the complete collection of The New Scooby-Doo Movies has 23 out of the 24 produced episodes — minus "Wednesday is Missing".

It's a simple matter of an intellectual property dispute. While "Wednesday is Missing" may have been released on VHS at some point (we know it was released in Australia as Scooby Doo Meets the Addams Family), it has never been released on digital home release. As of this writing, the Charles Addams estate still refuses to release the rights to the characters for a DVD, Blu-Ray, or digital release.

The episode has been uploaded here and there online, but an actual official release still eludes us. Do you remember this semi-lost media from 1972?