Race to the Finish (IV) - S1.E20

The race begins, and Dingle tries to send Jamie in a different direction by planting a confusing sign on the course. Sators jockey throws dirt in Jamie's face, and tries to push him from the horse. But Jamie hangs on, and even though Sator has planted a fresh horse on the track, Jamie still wins the race, with a little last moment help from Sid. The Salamander is theirs, but they are horrified to find that there is no cryptogram on it. And to make matters worse, Dingle has planted a vision bug on the Poopmobile which even Matt is unaware of.