When K.C. goes into a virtual reality game to rescue Ernie, it becomes the craziest Halloween ever for the teen spies as they try to tackle the alternate universe and enemy agents Darci and Damon, the masterminds behind the evil game.
- Zendaya as K.C. Cooper
- Veronica Dunne as Marisa Miller (illusion)
- Kamil McFadden as Ernie Cooper
- Tammy Townsend as Kira Cooper
- Kadeem Hardison as Craig Cooper
- Jamie Moyer as Jodie Goldfeder (illusion)
- David Hull as Damon
- Natalie Lander as Darci
- Josh Swickard as Football Dude (illusion)
- Ross Butler as Brett Willis (illusion)
- A major figure from the past returns.
- This is the second Halloween episode with the first being All Howls Eve.
- Brett Willis returns after 19 episodes, although he has been mentioned twice. He appears as an illusion.
- Twelfth time Judy is absent.
- It was mention by the promo, that it is just a evil game and that K.C. is going to rescue Ernie but gets trapped and all of her own family and friends are evil and try to destroy her.
- Josh Swickard is best known for portraying Todd Stetson in Liv and Maddie.
- This is the second time where K.C. and Kira fight, the first time is in the episode Operation: Other Side Part 1.
- And this is also the second time K.C. and Craig fight with the first time being In Too Deep, Part 2.
- This was the final overall appearance of Jodie Goldfeder.
- October 9, 2016 (Canada)
- November 1, 2016 (Latin America, Brazil)
| To view the Virtual Insanity gallery, click here.