Seven Little Monsters was a popular educational show created by Maurice Sendak (of Where the Wild Things Are) featuring seven anthropomorphic monsters and their day to day life as they learn lessons while exploring the world around them. However, despite its popularity it has become fairly rare.
Thankfully, a YouTube user named Misoke has uploaded several episodes from the show's three seasons, sourced from various home media releases. However, as not every episode made it to home video, Misoke's uploads are still missing several episodes, most notably from Season 2.
Reportedly, the missing Seasons 1 and 2 episodes have surfaced on a private forum, although they have yet to make their way out publicly. A few missing episodes from Season 3 remain completely at large, though interestingly the Nelvana Outreach VHS features brief clips from some of the Season 2 and 3 episodes in question.