So On and So Forth present 'Human Era'

The ruse here is that this trio have permanently lost their fourth member with the deceased’s estate imposing a ban on his work being used. Cue ingenious skits with jokes and set-ups going missing, while a running gag about a space mission fares better than their obsession with numbers-based routines and a predictable sequence about bad improv.

The Caves, 556 5375, until 27 Aug, 4.45pm, £7.50 (£6.50).