“Sam & Cat,” which premieres Saturday on Nickelodeon, takes the sidekicks from two other Nickelodeon shows — Jennette McCurdy’s Sam Puckett, from “iCarly,” and Ariana Grande’s Cat ...

By Philiana Ng Nickelodeon is doubling down on iCarly and Victorious crossover spinoff Sam & Cat. Sam & Cat, created by veteran comedy producer Dan Schneider, follows Sam and Cat as they become ...