Toby and the Flood is the tenth episode ever made in Season 5.
During many days of rain, Toby is asked to investigate a dam during rainy weather, and discovers it is about to burst its banks. Toby hurries to get to higher ground, but the bridge he is on is swept away after the dam collapses. Harold drops a rope to be tied to Toby's bufferbeam and gives the other end to Percy. Toby is saved and when the flood subsides and the dam mended, a party is held in Toby's honour.
- The narrator mentions that Toby has his own branchline, but Toby doesn't have his own branchline anymore.