You Can't Do That on Television - Season 9 Episode 10
Time

The Days of Our Lives will not be seen at this time so that we may present... The budget for the show has been cut so it must be filmed in black and white. All the kids go into a decolorization machine. When the producers realize that color shows are more profitable the kids cant switch back. In their attempts to overcome the glitch, they turn the show into a silent movie at the end.