“Forgotten musical”: Now there are two terrifying words. In a genre where welcome revivals include a play inspired by that painting in Ferris Bueller’s Day Off, you gotta be wary of anything time has left behind. The follow-up to their giant hit Cabaret, John Kander and Fred Ebb’s The Happy Time tells the story of a French-Canadian photographer returning to his tiny home village. Poutine ensues. No, that’s not really it; lead character Jacques discovers that a) all is not well with his family; and b) you can’t go home again. The original Broadway production, starring the inimitable Robert Goulet, was reportedly the first-ever Broadway show to lose a million dollars; 40 years after its debut, Signature aims to rehabilitate its reputation with a crack cast and sympathetic direction by Michael Unger. And maybe, if we’re lucky, a couple of improved moose jokes. The performance begins at 8 p.m. at Signature Theatre, 4200 Campbell Ave., Arlington; see City List for a complete schedule. $45-$69. (703) 537-7328.