Oscar(R)-Winner J.K. Simmons Guest Stars in Brand-New "SpongeBob SquarePants" Episode Premiering Saturday, March 4, at 10:00 a.m. (ET/PT) on Nickelodeon

All-New "Bunsen is a Beast" Special Featuring "The Fairly OddParents" Characters Follows at 10:30 a.m. (ET/PT)

Oscar(R)-winner J.K. Simmons (Whiplash) makes his Bikini Bottom debut during a brand-new episode of SpongeBob SquarePants, "Snooze You Lose," premiering Saturday, March 4, at 10:00 a.m. (ET/PT). Simmons voices Maestro Mackerel, the middle-aged and impatient conductor of the Bikini Bottom Philharmonic. Beautiful music sends him into ecstasy, but bad playing is physically painful to him and he shows his displeasure by tying instruments into knots (usually around the unfortunate musician's head).

In the episode, "Snooze You Lose," Squidward is so tired that SpongeBob and Patrick can't wake him up, but they won't let him miss his big audition!

Immediately following is a special half-hour episode of Bunsen is a Beast at 10:30 a.m. (ET/PT), featuring a crossover with longstanding series The Fairly OddParents. Both shows are created and executive produced by Butch Hartman and in "Beast of Friends," it's Bunsen and Cosmo's Friend-iversary, so Bunsen excitedly takes Mikey to meet him in Dimmsdale, while Amanda secretly follows. The group has a great time, until Mr. Crocker and Amanda team up and decide to take them down!