Kelly secretly hires choreographers to give Brooke and Paige an edge. Meanwhile, to everyone's surprise, Cathy shows up with her rival dance school.
The girls struggle with a military-inspired group dance, Abby and the mothers are suspicious of Mackenzie's sudden foot injury, and Abby has a date.
A robbery at the Williamsburg diner puts Han in a new light and reveals Max and Caroline's true colours.
Sweets ruffles Brennan's feathers when he takes Booth's place in an investigation into a murdered swimming coach with a secret after-hours career.
The future of Sullivan's career hangs in the balance as his disciplinary hearing gets underway; the crew investigates an electrical fire at a neglected apartment building that serves as the home for some of Seattle's most prominent drag queens.