When Darien is mysteriously injured in an accident, K.C. tries to figure out who is behind it. Meanwhile, Craig becomes head of security for a vice-presidential candidate.
- 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
- Kara Royster as Abby Martin
- Chris Taverez as Darien
- Rick Fox as Richard Martin
- Rick Hall as Agent Johnson
- Robert Gant as Jackson Cleveland
- Ethan Wacker as Collin Cleveland
Special guest star
- Jasmine Guy as Erica King
- This episode is a continuation of the last episode.
- Richard, Abby's father, and Erica's husband appeared in this episode.
- It is revealed that Abby was the one that purposely hurt Darien.
- K.C. and Darien break up in this episode.
- K.C. wears the same jacket as she wore in My Sister from Another Mother... Board.
- Abby and Erica reveal that they are going to force K.C. and Kira to carry out a mission for them.
- If they don't do the mission Abby and Erica will kill their family.
- The episode title is coincidentally the same as the "Thomas The Tank Engine Song" in 1998.
- This episode features Ethan Wacker, who later joined the main cast of Bizaardvark
- April 17, 2016 (Canada)
- June 25, 2016 (Latin America, Brazil)
- August 10, 2016 (Israel)
| To view the Accidents Will Happen gallery, click here.