The Grim Adventures of Billy & Mandy

Which Came First?

Directed by Brian Sheesley
TV-Y7
S3 • E16    Jul 29, 2004
7.6
In "Which Came First?", when a field trip across the desert is ruined by the school bus' flat tire, Billy, Mandy and Grim go into a cave infested by giant mutant chickens. In "Substitute Teacher", Nergal Junior's first day at his cousin Billy's school results in him being bullied by Sperg, so he transforms into Ms. Butterbean, the school teacher, to exact revenge.

Where to Watch Which Came First?

Cast of Which Came First?

  • Greg EaglesGrim (voice)
  • Richard Steven HorvitzBilly (voice)
  • Grey DeLisleMandy (voice)
  • Vanessa MarshallIrwin (voice)

 

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