What would it be like to be a Beatle even briefly at the height of the band’s popularity? John Anthony Gorman plays Billy Campbell, a musician brought in as Paul McCartney’s double in this play written by Claude Solnik and directed by Donna Mejia. Olivia Boren, Ed Altman, Tyler Beau Humphries, Sophie Max, and Michael Metta bring the story to life. Alexander Santullo is technical director.