Between 4:00 am and 5:00 am on December 21, and December 30, 2000 (while "Space Ghost Coast to Coast" was on hiatus), several new Williams Street series made unannounced "stealth" premieres. "Sealab 2021", "Harvey Birdman, Attorney at Law", "Aqua Teen Hunger Force", and "The Brak Show" all premiered unannounced; the official schedules listed the shows as "Special Programming". Prior to that, in Entertainment Weekly, it was stated that Michael Ouweleen's next project was working on the "Harvey Birdman, Attorney at Law" Pilot with J.J. Sedelmaier. In a 1999 interview, the indie pop rock band Calamine stated they had recorded the theme song for "Sealab 2021". While entertaining pitches for a variety of adult cartoons, Lazzo realized the potential for packaging them as a complete adult-focused block. Different names were considered, including "ibiso", which was said to be Spanish for "stop", and “Parental Warning", "Parental Block" but he eventually settled on "Adult Swim".