Sammy Davis Jr., Zsa Zsa Gabor & Hedda Hopper in Alice in Wonderland (1966)

This Hanna Barbera production of Alice in Wonderland (subtitled What's a Nice Girl Like You Doing in a Place Like This?) is updated to contemporary suburban America. The familiar tale is changed to reflect the times beginning with Alice's (Janet Waldo) journey, which isn't down a rabbit hole, but through a television screen. She meets the requisite assortment of characters including the White Rabbit, Cheshire Cat (Davis Jr.), the Queen of Hearts (Gabor) and the Mad Hatter (Harvey Korman) who, in this version has a wife played by Hedda Hopper. Also featured are Fred Flintstone and Barney Rubble (Alan Reed and Mel Blanc) as the Talking Caterpillar.

As far as I can tell, this production of the classic story isn't available on DVD. It can be seen in full on YouTube, however. Above is part one, uploaded by OneDareLand.

Obscurity factor: 9 (not on DVD, available on YouTube, not well remembered)

Alan Reed, Mel Blanc & Harvey Korman in The Man Called Flintstone (1966)

The curious similarity between secret agent Rock Slag and Fred Flintstone is uncanny. It's this similarity that lands Fred the job of filling in for Slag when he's injured in Bedrock. His assignment is to stop the terrible Green Goose from destroying the world and that quest takes him to Paris and Rome.

MoviePosterShop.com

This full length feature is the first one starring the popular characters and, though silly, has a flashy sixties style to it. Listen for the voice of Harvey Korman as Chief Mountmore. Also featured are voice artists Janet Waldo and Paul Frees.

This is marginally well known to the general public and very well known to fans of The Flintstones and fans of cartoons in general. It's available on DVD and can be watched on Veoh. Above are the opening credits, uploaded to YouTube by alexmystyleno3.

Obscurity factor: 2 (somewhat known to the general public, on DVD and Veoh)

Daws Butler & Janet Waldo in The Space Kiddets (1966)

This Hanna Barbera series set in space features a gang of kids who were constantly beset upon by space pirate Captain Skyhook and his evil henchman Static (both Butler). The kids were less distinct, though they did have cute names, including one named, oddly enough, Snoopy. Their dog was called Pupstar. The shows were originally produced as 15 minute stories meant to be interspersed with other content in a half hour time slot.

The clip above is the opening sequence, uploaded by cartoonboy180. One of the more memorable conceits of the show revolved around a treasure map that the Captain wanted from the kids, but was unwilling to do them harm to get. Static on the other hand was more than willing to go that extra mile and was constantly being kept in check by the Captain, as can be seen in the clip below, uploaded by WarnerBrosOnline. The animation style was clever and sophisticated with something of a Chuck Jones quality to it, as evidenced by the quivering spaceship in this clip.

This series has made it to DVD, along with the show that replaced it - Young Samson. It's part of the Warner Archive collection.

Obscurity factor: 9 (on DVD, barely remembered)

Fred Travaleno & Janet Waldo in The Secret World of Og (1983)

This animated miniseries was originally broadcast as part of the ABC Weekend Specials. It tells the story of Penny, Peter, Patsy and Pamela who go through a trap door in the floor of their playhouse in search of their brother, Paul, who's mysteriously gone missing. While down there, they discover the world of Og, populated by small, green people who can only say the word "og." This series was based on a Canadian children's literary classic of the same name by Pierre Berton.

This has been released on DVD and can be found on Amazon. Above is a little taste of the show, uploaded to YouTube by spockvideo.

Obscurity factor: 8 (available on DVD, not well remembered)

June Lockhart & Micky Dolenz in These Are the Days (1974)

This series about the lives of the Day family living at the turn of the last century in a small rural town could be considered a mashup of The Waltons and The Flintstones. The animated series had a more somber tone than the usual animated fare, with thought given to realistic circumstances and interpersonal interactions. It was produced by Hanna-Barbera and was one of the few dramatic series the studio tackled.

Above is the opening sequence of the show, which only aired for one season - 1974 - '75 before being canceled after only 16 episodes. The sequence was uploaded to YouTube by muttley16.

Obscurity factor: 9 (fondly remembered by some fans, hard to find, not available on DVD)