So why are you doing an explainer about Bubble Guppies if you don’t know what a Bubble Guppy is? Well, I know that Bubble Guppies is a show that my daughter watches. At least I think it’s a show.

Nickelodeon's hit preschool series Bubble Guppies will make a splash with the debut of an all-new season and a brand-new guppy on Friday, Sept. 27, at 12 p.m. (ET/PT). Season five of Bubble ...