BATS Improv presents a special late-night show featuring the never-before-seen-together duo of Joe Bill and Tim Orr at Fort Mason Center for Arts & Culture. The two master improvisers perform spontaneous scenes and riff off each others’ fertile imaginations to make a bunch of stuff up.

Ticket for the late-night show only are $10. Ticket holders from the earlier 8:00 p.m. to 10:00 p.m. August 11 show, The Bat, have free admission to the second show.