Twin hosts Skip and Treybor develop a sibling rivalry. Teenage dinosaur Randy gets dumped. David hides his friendship with the cute Create-A-Crittles.

Randy applies to Music College. David's pals colorize his logo. "The Strongimals" visit Earth and meet Skip, whose cameo role is mocked by Treybor.

Skip's fame grows, along with Treybor's jealousy. Randy makes a friend at Music College. The Create-A-Crittles join David's corporate creative team.

The show gets a new studio. Skip now stars in "The Strongimals." A comedian presents "Lil' Bruce." The Crittles — and David's marriage — split up.

An episode of "Primeline" profiles rising star Skip and tracks a startling disappearance. The "Pro Bros" live in the shadows of their famous brothers.

Treybor pays a humiliating visit to the set of Skip's new film. The Pro Bros mount a rescue mission. A disappearance becomes a homicide investigation.

The stars of the Saturday-morning lineup join the president and pop star Nuance to address a serious social issue: the disrespectful phrase, "Shut up!"