What do you think of this as an idea for a play?

For story-structure purposes, sure, have 3 acts...by which I mean an introduction section which leads to the first big cliffhanger; a middle section which amps up all the drama, twists and complications; and a final section which has the big climax or twist, and then wraps it up. But I would totally avoid thinking about writing it in 3 actual acts with 2 intervals, and in fact I'd suggest trying to write it into ONE act unless the story structure absolutely demands being split into two halves with one interval. Splitting a play into acts requires each part to virtually work as a play all by itself. The end of an act needs to leave us definitely wanting to return, the beginning of an act needs to start from scratch and pull us back into the action after being distracted outside. Far easier to write it as a complete uninterrupted unit. Don't impose an interval unless you're sure you can pull it off. Cheers, Craig ~<8>-/====\---------