This article is about the episode of Invader Zim. For the similarly-titled episode of Doctor Who, see The Daleks' Master Plan.
1st episode of the 1st season of Invader Zim
"The Nightmare Begins"
Invader Zim episode
Ms. Bitters introduces Zim to the class.
Episode no.
Season 1 Episode 1
Directed by
Steve Ressel
Written by
Jhonen Vasquez Rob Hummel
Production code
101
Original air date
March 30, 2001 (2001-03-30)
Guest appearances
Brad Abrell as Announcer
Mo Collins as Robo-Mom and Zita
Phil LaMarr as The Letter M
Michael McDonald as Robo-Dad
Jhonen Vasquez as Computer Voice, Old Kid and Brain
Episode chronology
← Previous "Pilot"
Next → "Bestest Friend"
List of episodes
"The Nightmare Begins" is the series premiere of the American animated television series Invader Zim. It originally aired in the United States on Nickelodeon on March 30, 2001.[1]
This is the first official episode to feature Richard Steven Horvitz as Zim. In the pilot episode, he was originally voiced by Mark Hamill, and then Billy West. Shortly after the cancellation of The Angry Beavers, Horvitz was brought in as a potential voice of Zim, and was asked to record over certain lines for the pilot. Though neither his nor Hamill's cuts made to an official release, he voiced Zim for the remainder of the series.
^"Nickelodeon Cans INVADER ZIM". 18 January 2002. Retrieved 8 March 2022.
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