Doctor Thorne (2016)

S1E23 Where's Scooby-Doo? (1)

The kids receive unexpected train tickets for a journey on the Orient Express. However, when they board, Scooby discovers that his bag has been swapped with someone else's. As he sets out to find his beloved bag filled with Scooby Snacks, he suddenly disappears too. Now, the gang is left wondering if Scooby was taken by the mummy or the spy who pilfered the fuel formula.