After becoming an Avatar, Leo becomes happy and content, making Piper suspicious. After a teacher is shot at the Magic School, Paige enlists Kyle's help. They find a book written by two brothers, one of whom had been previously shot under the same circumstances, and just as they realize it is unfinished, it sucks them in. They emerge in a Film Noir set in a 1930s-inspired world.
- Asshole Victim: The gnome at the start. When interviewing potential suspects, it's noted that there are a lot who would have liked to kill him.
- Comically Missing the Point: Courtesy of Piper - "Who would shoot a gnome? And why is the 'g' silent?"
- Deliberately Monochrome: The events of Crossed, Double Crossed are presented in black and white.
- Everyone Calls Him "Barkeep": In the book, Kyle is only referred to as 'The Fed' in the narration.
- Femme Fatale: Invoked by Paige, as she tries to act like one.
- Genre Savvy: Kyle and Paige guess how the story is going to go, based off their own knowledge of film noir.
- The Great Depression: The story of Crossed, Double Crossed takes place in the thirties.
- Loophole Abuse: Phoebe can't write Paige and Brody out of going the wrong way - so she compromises by writing in a plot twist to warn them. A piano dropping in front of them.Kyle: Guess your sisters agree with me.
- Reality Ensues: Feeling like his old self again, Leo begins the romantic gestures towards Piper. However, she's not ready for that—saying she can't just act like she didn't spend months trying to keep him from falling into a psychotic abyss.
- Reality-Writing Book: Played with. The story seems to exist on its own, but Phoebe is able to influence the plot by writing in the book.
- She Cleans Up Nicely: Paige puts on a 1940s style gown and gets this reaction from Kyle.
- Story-Breaker Power: Literally. Avatar power is able to override the book's spell, allowing Piper and Phoebe to look at it without getting sucked in.
- Troperiffic: In-universe. The story Crossed, Double Crossed is full of classic noir tropes.