Five couples compete for a chance at winning the coveted "Len Goodman Mirrorball Trophy"; the finalists perform a redemption dance and an unforgettable freestyle routine.
The 11 celebrity and pro-dancer couples take on performances inspired by "Grease"; Frankie Avalon performs; a surprise appearance by an original Pink Lady herself, Didi Conn, who played Frenchie in the film.
Cher joins the show as a guest performer and judge in Len's absence as the contestants dance to Cher hits. In addition to their individual routines contestants have to prepare for any of three styles in a head-to-head dance-off.