After “Xanadu” was dubbed the worst movie of 1980, the only place to go was up. Surpassing a Broadway sendup of the film in 2008 that generated four Tony nominations, Signature Theatre’s season finale turns the critics’ raspberries into into a delectable dish of retro silliness replete with Greek muses, goofy fashions and nostalgia for roller rinks. Remnants of the original score join fresh numbers by Jeff Lynne and John Farrar.

Matthew Gardiner directs and choreographs the cast of local favorites in “Xanadu,” including Erin Weaver as Kira, the goddess portrayed in the film by Olivia Newton-John. Charlie Brady is Sonny Malone, the artist Kira mentors, Sherri L. Edelen is wacky muse Calliope/Aphrodite, and Harry A. Winter as Danny McGuire reprises the Gene Kelly role on clarinet minus the dancing moves. The fanciful, romantic tale is told on roller skates amid eclectic period sets and lighting.