Ernie and Judy must travel to NYC for the Central Park Spooktacular to intercept an evil wolf serum, but their mission is interrupted when they run into "Jessie's" Emma and Zuri at the party. Meanwhile, Marisa and K.C. throw their own Halloween bash back at the house and K.C. decides to dress up as a spy to impress the new boy in school, River.
- Zendaya as K.C. Cooper
- Veronica Dunne as Marisa Miller
- Kamil McFadden as Ernie Cooper
- Trinitee Stokes as Judy Cooper
- Tammy Townsend as Kira Cooper
- Kadeem Hardison as Craig Cooper
Special Guest Cast
- This was K.C. Undercover's first crossover & Halloween episode.
- Jessie stars Peyton List and Skai Jackson will guest star in this episode.
- Scenes with Emma and Zuri most likely happened while they were still in Spooktacular before going to Stuart's party.
- This was part of Disney Channel's Spooktacular weekend featuring two-character crossovers in each show. Ernie and Judy appeared on the Austin & Ally episode, Scary Spirits & Spooky Stories.
- This episode was available early on Watch Disney Channel & Xfinity on Demand.
- October 29, 2015 (Poland)
- October 30, 2015 (Latin America, Brazil, Spain and Portugal)
- December 22, 2015 (Israel)
| To view the All Howls Eve gallery, click here.