|Season 1||Season 2||Season 3||Episode Guide|
Season 3 of K.C. Undercover was confirmed exclusively by People Magazine on August 1, 2016. On November 1, 2016, Disney Channel officially confirmed the third season. Production began on February 21st, and wrapped on September 30th, 2017. It premiered on July 7, 2017.
It was announced by a main cast member that the series had wrapped up on September 30, 2017. The series finale was mentioned by Disney Channel in a promo in January 2018 and on Twitter using the hashtag "GoodbyeKCUndercover", offically ending the series.
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 (24/24)
- Veronica Dunne as Marisa Miller (23/24)
- Kamil McFadden as Ernie Cooper (24/24)
- Trinitee Stokes as Judy Cooper (19/24)
- Tammy Townsend as Kira Cooper (19/24)
- Kadeem Hardison as Craig Cooper (19/24)
- François Chau as Zane Willis (3/24)
- Zendaya as Bernice (2/24)
- China Anne McClain as Sheena (2/24)
- Haley Tju as Zoe (3/24)
- Connor Weil as Brady (11/24)
- Chris Taverez as Darien (2/24)
- Sherri Shepherd as Beverly (4/24)
- Rick Hall as Agent Johnson (12/24)
- Kirrilee Berger as Amy Bishop (5/24)
- Jonathan Silverman as Mitch Bishop (4/24)
- Kirsten Nelson as Danielle Bishop (4/24)
- Riley Litman as Reid Chase (3/24)
- James DiGiacomo as Petey Goldfeder (2/24)
- Matthew Gold as Howard Morris (3/24)
- Chandler Kinney as Monique (2/24)
- Eris Baker as Diane (2/24)
- Brandon Black as Byron (3/24)
- Ashley Tavares as Ms. Shaffer (2/24)
- Christine Rodriguez as Gwen Pepper
- Claudia de Vasco as Shady Woman
- Pablo Ramos as Rio De Janeiro Local
- Main article: Episode Guide
- 07/07/17 - Coopers on the Run (301-302)
- 07/14/17 - Welcome to the Jungle (303)
- 07/14/17 - Out of the Water and Into the Fire (304)
- 07/28/17 - Web of Lies (305)
- 08/04/17 - Teen Drama (306)
- 08/11/17 - K.C. Under Construction (307)
- 08/18/17 - The Storm Maker (308)
- 08/25/17 - Keep on Truckin' (309)
- 11/03/17 - Unmasking the Enemy (310)
- 11/10/17 - The Truth Will Set You Free (311)
- 11/17/17 - Stormy Weather (312)
- 11/24/17 - Deleted! (315)
- 01/15/18 - Second Chances (313)
- 01/16/18 - Revenge of the Van People (314)
- 01/17/18 - The Gammy Files (319)
- 01/18/18 - Take Me Out (316)
- 01/22/18 - Twin It to Win It (317)
- 01/23/18 - Cassandra Undercover (318)
- 01/24/18 - K.C. Times Three (320)
- 01/29/18 - The Domino Effect (321)
- 01/30/18 - Domino 2: Barbecued (322)
- 01/31/18 - Domino 3: Buggin' Out (323)
- 02/01/18 - Domino 4: The Mask (324)
- 02/02/18 - K.C. Undercover: The Final Chapter (325-326)
- 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. was a senior in high school this season.
- This season premiered the day that Zendaya's Spider-Man: Homecoming came out in theaters.
- This season premiered on Fridays, instead of Sundays, unlike the previous seasons.
- China Anne McClain guest starred this season.
- This was the second time the first episode had "Coopers" in the beginning, first being Coopers Reactivated!.
- This was the first and only season to start and end with a one-hour special.
- Kadeem Hardison directed an episode this season.
- The Opening Titles (theme song) changed this season, with slower speed and new background music.
- This season made K.C. Undercover the fourth Disney Channel Original Series to alter the theme song for a third season after Hannah Montana, A.N.T. Farm, and Girl Meets World.
- The first dozen episodes of the season was composed of three multi-part arcs:
- Coopers on the Run (301-304)
- Web of Lies (305-309)
- The Gathering Storm (310-312)
- K.C. Undercover was Zendaya's second Disney Channel show to have 3 seasons after Shake It Up.
- The show wrapped with 75 aired episodes just like Shake It Up.
- This was the final season of the series.
- Marisa’s Mother was introduced in this season.
- On the series finale premiere night, the hashtag #KCUndercover was trending on Twitter.
| To view the Season 3 gallery, click here.