World of Giants

I do remember this series. Mel traveled in a briefcase with a special chair (and later a door built into the same briefcase so he could come and go without the case being left open). I also remember his house being hidden behind a painting in the wall. I can also recall the episode where the villain attacked Mel in his house....I seem to remember that this particular story ends with Mel insisting that his fellow cast exercise as part of a fitness program. Sorry if this seems fragmented; I'm writing as I recall a series shown when I was 7 years old.

Thanks...I hope we can someday unearth this short lived (but really interesting) series.