The Doctor, Ian and Barbara find themselves miniaturised and pursued by a bird in scenes which clearly influenced Pixar's A Bug's Life.  The scene of the hiding under a giant button is a marvel.

Decided to do all 16 stories of these I think there basically Ian 1st and Barbara stories the final 2 retell the webplanet with just those 3 but over all there not the best but I think if I was from the 1960s I’d love them