Night of the Were-Diesel is the sixth episode of Season 2 of Best Friends Whenever and the twenty-fourth overall. It aired on October 2, 2016.


When Cyd tries to protect Diesel from Barry’s wolf serum experiment, she accidentally gets the serum on herself and turns into a menacing werewolf. Now Shelby must try and figure out how to get her best friend back before the she-wolf destroys their high school’s Halloween carnival And Haunts the School.


Main cast

Memorable Quotes



  • This is a Halloween themed episode.
  • This is the second Halloween themed episode of the series, first being, Cyd & Shelby's Haunted Escape.
  • This is the first new episode to air after a 2 month hiatus.
  • Similarly, a Monstober episode of KC Undercover, All Howls Eve also featured a wolf serum that did something similar and made Ernie act like a werewolf.

International Premieres

  • December 26, 2016 (Israel)
  • December 31, 2016 (Latin America, Brazil)


Monstober 2016 - Best Friends Whenever - Week Of Premieres

Monstober 2016 - Best Friends Whenever - Week Of Premieres


To view the Night of the Were-Diesel gallery, click here.