The ninjas must stop a cat burglar named Katara Sharp (Sydney Tamiia Poitier) who just happens to be dating Mike's dad (Randall Park).

Co-stars: Edwin H. Bravo as Hog, Brandon Molale as Actor Owen is having a hard time with the boring discipline of Grandpa's teachings.

When he recognizes that an old friend (Jonny Weston) is part of the dangerous Subsiders parkour crew, Owen infiltrates their underground lair to save him.

A group of thieves named Clarissa (Daniella Monet), Bethany (Kiralee Hayashi) and Fiona are disguised as prep-school girls who want to become rich by stealing printing plates for $100 bills.

A villainous brother named Optic (Dennis Keiffer) and his sister Buzzsaw (Danielle Burgio) the duo steal purple diamonds around the city to bring their dying father called Mechanov (Curt Lowens) back to life as a robot.

A string of burglaries have occurred and Mike is convinced the Skeleton Crew, an underground secret society with ties to Benjamin Rush High School, is to blame.

Meanwhile, Owen has trouble hiding his ninja skills and almost exposes his friends and himself twice, once while trying to defend a boy from a shifty-looking senior student who was actually selling cupcakes to raise money for children's hospitals and when Limelight captures his final target.

Mike and Amanda scold him afterward but Hologramps takes pity on Owen because he was trying to do the right thing, he also knows how he feels about not receiving enough attention and not getting credit for helping to save Empire City, but he tells him that a ninja's strength comes from within, not the opinion of others.

Guest Star: Cody Christian as Flint Forster A photo of Owen in his ninja suit (beating a bad guy) goes viral.

During Spirit week, a rival cheerleader from Amanda's past named Kylie Coors is released from juvie and visits Benjamin Rush.

Guest Star: Cody Christian as Flint Forster Owen pursues his crush on Paloma Peru, but gets captured by a girl who likes him; Mike and Amanda bond while filming an audition tape for a game show.