"Deja Foo" is the 35th episode of Yin Yang Yo!
- This episode features Ultimoose as the main antagonist.
- This is the first episode to feature the Four Woo Foo Elders.
- This is the first episode to include the temporary death of Yin and Yo.
- The episode's plot is a nod to Groundhog Day.
- When the truck driver wiped Ultimoose down, the show slowed down at that moment.
- Brother Herman was taller than Fastidious, altrought ants were smaller than hamsters.
- This episode has the longest flashback, roughly 14 minutes of flashback. Alongside with 600 Channels Of Doom (8 minutes) and Commander-In-Cheat (42 seconds)
- Yang breaks the fourth wall before the end of the episode, aware of his status as an animated character, referring to himself as a "cartoon rabbit who doesn't wear underwear".