Sheldon dresses up as the Doppler Effect for Penny's Halloween party. When Penny asks about his costume, Sheldon explains the Doppler Effect to her.

The London Aquatic Center is one of the most technologically advanced pools. Pools can generate a lot of waves when lots of swimmers are in them making it more difficult for the athletes to go fast.

The crew is trying to rob the Bellagio in Las Vegas, and Basher informs them that the only way to pull off the job is to use a "pinch." He describes the "pinch": an electromagnetic pulse that shuts down any power source within its blast radius. He describes the "pinch" as a nuclear bomb without the destruction to make it more concrete.

Farah and Stella discuss the progress they've made in boosting Stella's powers. Luna states that they don't have time to wait and controls the light around Stella to prove how powerful it is to control what people see.

Charlie explains the Doppler Effect by using bats' use of echolocation as an example.