Andria Theatre's improv team, the Quad Squad, will host "Lost Sock Day," its second online live show at 7 p.m. Saturday, May 9.

"Join our Facebook Live Stream as we commemorate National Lost Sock Memorial Day the only way we know how, by performing a live improv show," it announced.

Now five years old, the Quad Squad performs regularly in the Alexandria area at fundraisers and other events. Members tackle challenges like speaking in alphabetical sentences, or suddenly creating a voice or a character for a role. They perform on the fly, without rehearsing.

Its name comes from the Andria Theatre's old name, the Alexandria Area Arts Association, or the Quad A.

To join their online show, visit Quad Squad Improv on Facebook.