You may find it odd to see the Mickey Mouse Club in this thread--but there's a version of it that belongs, in between the two iterations we all remember.
Baby boomers remember the original 1955-59 Mickey Mouse Club on ABC (the one that made Annette Funicello a breakout star)--which was still doing well in the ratings when ABC dropped it, largely because the network didn't want to continue paying the high production costs of a 5-day-a-week comedy/variety show for kids, and Walt Disney didn't want to turn it into a cut-rate product. Disney then pulled all his programming (including Zorro and Disneyland) from the ABC network and took his act to NBC in 1961, where the successor to Disneyland started a 30 year run...but NBC had a set daytime lineup of soaps and game shows and wasn't interested in buying a new Mickey Mouse Club production run in the early 1960s. So Disney repackaged and syndicated the 1955-59 production to a new generation of kids seeing it for the first time on local stations across the country starting in 1962, and enjoyed a pair of successful runs from 1962-68 and again from 1974-76. That encouraged them to launch a new full-color production of the Mickey Mouse Club with a new set of tween-aged and teen-agedMouseketeers who would connect with a generation of kids born since the old show had started to age into nostalgia. Disney remembered their sour experience working with a network, and their success in selling the reruns themselves market-by-market, so they did the new show in syndication, marketing it directly to local stations without shopping it either to CBS, ABC or NBC. It started in January of 1977 with fewer than 40 markets carrying it, got as high as about 70 by mid-year, but lost so much money the New Mickey Mouse Club never made it to a second season of production. It's been pretty much forgotten today and so are that generation of Mouseketeers (although Courtney Love auditioned for the show during casting late in 1976 as a 12-year-old, and almost made the final cut...try to imagine how interesting a Mouseketeer she might have been).
Third time was a charm for the Mickey Mouse Club, which made a comeback with all-new shows in 1988 on Disney's own cable channel without ever hitting over-the-air broadcast. The third Mickey Mouse Club lasted the longest, through the mid-90s, and created the biggest number of kid Mouseketeers who grew into major adult stars, including Ryan Gosling, Keri Russell, Britney Spears, JC Chasez, Justin Timberlake and Christina Aguilera.