This one-man play, billed as a comedy, technically is neither “one man” nor wholly comic. Written by Duncan Macmillan and performed by Jonny Donahoe, it’s a play in which the audience around Donahoe is called on, many times, to participate. It’s also a play in which the leading character tries to process the confusion, as a child, of his mother’s suicide attempt – the first of many. The boy’s reaction is to compile what he hopes is a persuasive list of things worth living for – hence, the Every Brilliant Thing of the title.