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K.C. and her family of spies find themselves hiding from their enemy, Zane, and K.C.'s BFF, Marisa, is right there with them. It's also K.C. and Marisa's last year of high school. So while K.C. is focused on protecting the world from disasters, Marisa is focused on how she can make their senior year epic!
- 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
- Françios Chau as Zane Willis
- China Anne McClain as Sheena
- Haley Tju as Zoe
- TBA as Passaro Grady
- TBA as Shady Woman
- TBA as Brady
- Christine Rodriguez as TBA
- Claudia de Vasco as Shady Woman
- Pablo Ramos as Rio De Janeiro Local
- Main article: Episode Guide
These are episodes that have confirmed titles and dates.
- 07/07/17 - Coopers on the Run (301)
- 07/14/17 - Welcome to the Jungle (303)
- 07/14/17 - Out of the Water and Into the Fire (30?)
- 07/28/17 - Testing K.C. (305)
- 07/28/17 - Web of Lies (30?)
These are episodes that have been confirmed, but the airdate is unknown.
- Teen Drama (306)
- Stormy Weather (312)
- Three's a Crowd (313)
- Revenge of the Van People (314)
- How to Catch a Thug? (3??)
- The Best Party of the Year (3??)
- Keep on Truckin' (3??)
- Operation: Raincoat (3??)
- The Truth Will Set You Free (3??)
- Disney Channel executive VP Adam Bonnett talked a bit about the success of K.C. Undercover in a statement announcing the good news, saying everyone at the network is incredibly proud of the series’ popularity.
- Production started after Zendaya finished shooting Spider-Man: Homecoming and 'The Greatest Showman'. As well as Veronica Dunne with 'The Ninth Passenger'. Production began on February 15, 2017.
- K.C. is a senior in high school this season.
- The promo that was released, were showing Zane yelling "Where are the coopers!".
- This season will be premiere on the same day as Zendaya's Spider-Man: Homecoming is out in theaters.
- This season will premiere on Fridays, instead of Sundays, unlike the previous seasons.
- There was a 5 month and 24 days (25 weeks or 175 days) gap between Season 2 and this season.
- China Anne McClain will guest star this season.
- This is the second time the first episode had "Coopers" in the beginning, first being Coopers Reactivated!.
- Kadeem Hardison will direct an episode this season.
- This season will be the second longest running episode season of K.C. Undercover. Season 1 had 29 Episodes (27 aired (2, 1-hour specials)) and Season 2 had 26 episodes (24 aired (2, 1-hour specials).
| To view the Season 3 gallery, click here.