1. Erato in 'The Creature From the Pit'
Dont lie, you know exactly where Im going with this. If you were to X ray the Tythonian you would find several weather balloons, a stick and a man on a Tricycle wheeling it back and forth. But we all know it looks like a gentlemans region or Mr Nosey from the Mr Men books. To make it worse Tom Baker starts talking into its attachment, which then pins him to the wall while carving out a design as a clue for the Doctor. With a design brief of making the Tythonian look like a big green blob. Surely they could have done better than this. It looks like the personification of Syphilis. The most inadvertently hilarious thing is when at the end of the episode the Tythonian actually comes to say goodbye, sticking its proboscis through the front door of a throne room. It genuinely has to be seen to be believed.