One Henry, Three Girls: Part 1 - S2-E2
Trivia: When Kid Danger and Veronica are about to kiss in the park, the old man who stop them is holding a book called "Good Burger." The show's writer, Dan Scheider also wrote for the show Good Burger.
Crisis on Earth-X, Part 3 - S4-E8
Trivia: Supergirl says to her doppelganger "General, can you step outside." That line was said by Superman in Superman II.
Trivia: Robert Patrick complains about the rise of the machines and asks who is that gonna be good for? This is an homage to his role in the Terminator 2 Movie as the T-1000.
Trivia: When a Stormtrooper falls down into the mining pit after being shot by Ezra Bridger's energy slingshot, he yells the Wilhelm scream.