Walter’s time machine

Walter’s time machine is a time travelling vehicle belonging to Walter the Snail.

It first appears in episode 20 when Bob the Snail uses it to go back and forwards in time, in order to save Gary. Bob and the gang manage to travel back to a few days previous to the present, where they find out that Gary isn’t actually dead - he was just in a coma.

They quickly travel back to find him, but the previously dead Dump Truck Pirate and his crew stowaway on board and manage to travel back to the present with them. It is unknown how or why Walter built his time machine, but some suspect it was to go back in time and get back his shell - a plan which, evidently, must have failed.