Marli Scharlin’s ’16 production of Almost, Maine, coming to the PW downspace this weekend, is truly an ensemble show. There are no lead roles, but rather a cast of supporting characters each seamlessly stabilizing and carrying the next in toy-like fashion, such that if one performance fell, so would the show (yes, that is a Jenga metaphor, and a well-constructed one at that. Pun intended.) Luckily, no performers fell. Well, not figuratively. Quite literally, several characters fall.