The rescue at the auto junkyard features two derelict antique fire trucks. One of these trucks is a 1941 Peterbilt, identified by the headlamps on the fenders, the narrow perpendicular grille with horizontal pattern, and hood vents that run the length of the hood.
The rescue at the auto junkyard features two derelict antique fire trucks. Episode 2 of season 3 is when The Old Engine first appears, at the scene of a junkyard fire, perhaps foreshadowed by this episode.
During the junkyard scene, during a shot looking out between the cars, you can see a hand blocking the sun for the camera.