Sooty, Sweep and Soo are fast asleep in bed, with each of them dreaming. Both Sooty and Soo dream about being conductors, while Sweep dreams that he is a super hero, by the name of Superdog! At breakfast Matthew explains that the worlds strongest man, special guest, Geoff Capes is giving a demonstration of his strength later on that day. Sooty isn't convinced, but Matthew assures Sooty that he could easily move the piano in the lounge! Sooty proves he can as well, however it's with the aid of the magic wand! Sweep says that Superdog is stronger, but Matthew, Sooty and Soo laugh at him as they say Superdog isn't real! However Sweep has changed into his Superdog outfit and to prove he is stronger he moves the piano back into the kitchen. Sweep states it was Superdog, but they don't believe him (not aware of Sweeps secret identity) Later Matthew takes the gang to see Geoff Capes demonstrating how strong he is. Geoff Capes decides to use Matthew as a volunteer to proves his strength, but poor Matthew is no match and gets pulled through some mud! Sweep decides to take on Geoff Capes (as Superdog) to prove he is stronger. However the challenge is interupted when a lorry is heading for the school. It's up to Superdog to save the children from the runaway lorry! However Matthew wakes Sweep up and assures him that it was all a dream! Sweep is convinced until he realises he can't lift the bed, can't fly and doesn't have amazing mental powers! Finally Sweep accepts it was really a dream...and gets back into bed to dream about being Superdog once again......
