the independent character, Berk (the short blue animal), his preferent spider Drutt, & his friend Boni (the talking skull), sleep in a castle in "the dark and nasty regions", in which Berk serves A Tool Upstairs (world health organization never leaves his room, & is consequently never seen, although his bellowing voice is frequently heard). Additionally, Berk must guard a trapdoor in the floor of the servants' quarters, which leads to dark and mysterious caverns from either which, around most each episode, something may emerge... Though mostly hostile or even mischievous -- in a single occasion an invisible & troublesome animal known as "Bubo" -- now and again the helpful or even friendly animal did emerge. A big red animal known as Rog was a single lesson.

A series run ii seasons & numbered Forty episodes. Apiece episode was as much as 5 transactions yearn. All the character voices were provided by Willie Rushton.

Although selected episodes of the series were available within various videotapes in the UK at various days, just the uncommon double videocassette freed in Canada at one point actually contained each individual episode. It was nin until 2005 that all the episodes were eventually mass produced available on DVD in the UK.

the television series spawned a video game in the mid-80s called A Trap Door & the sequel known as Through The Trap Door. These games (available for the ZX Spectrum, the Amstrad CPC and the Commodore 64) probably introduced nearly when several population to a far-out blue animal when the series did. It may currently become played in the modern adp system applying various emulators.