The Grim Adventures of Billy & Mandy Which Came First?/Substitute Teacher (Season 3, Episode 8)
TV-Y7
TV Episode | 21 min | Animation, Adventure, Comedy

Primary photo for Which Came First?/Substitute Teacher

The Grim Adventures of Billy & Mandy

Which Came First?/Substitute Teacher (Season 3, Episode 8)

TV-Y7

TV Episode | 21 min | Animation, Adventure, Comedy

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 ...See moreIn "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. Written by Anonymous See less

Contacts

+ Add

Become a member to see contact information for Which Came First?/Substitute Teacher.

Cast	+ Add Cast
12 cast members

Name	Known for
Grey Griffin Mandy / Aunt Sis / Chick #1 (voice) (as Grey DeLisle) Mandy / Aunt Sis / Chick #1 (voice) (as Grey DeLisle) See fewer	Batman: Arkham City (2011)
Greg Eagles Grim / Sperg (voice) Grim / Sperg (voice) See fewer	Metal Gear Solid (1998)
Richard Steven Horvitz Billy (voice) (as Richard Horvitz) Billy (voice) (as Richard Horvitz) See fewer	Invader ZIM: Enter the Florpus (2019)
Dee Bradley Baker Scientist / Giant Chicken / Chick #2 (voice) Scientist / Giant Chicken / Chick #2 (voice) See fewer	American Dad! (2005)
Jane Carr Pud'n / Kid B (voice) Pud'n / Kid B (voice) See fewer	31 (2016)
Debi Derryberry Nergal Junior (voice) Nergal Junior (voice) See fewer	Jimmy Neutron: Boy Genius (2001)
Paul Eiding Barney / Janitor (voice) Barney / Janitor (voice) See fewer	The Transformers: The Movie (1986)
Martin Jarvis Nergal (voice) Nergal (voice) See fewer	Wreck-It Ralph (2012)
Rachael MacFarlane Mindy (voice) Mindy (voice) See fewer	American Dad! (2005)
Vanessa Marshall Irwin / Kid #1 / Kid A (voice) Irwin / Kid #1 / Kid A (voice) See fewer	Star Wars: The Bad Batch (2021)
Lara Jill Miller Girl / Kid C (voice) Girl / Kid C (voice) See fewer	Gimme a Break! (1981)
Renee Raudman Ms. Butterbean (voice) Ms. Butterbean (voice) See fewer	Metal Gear Solid: The Twin Snakes (2004)