By: Valerie Schremp Hahn, St. Louis Post-Dispatch

‘Circus Flora: Undercover’

When Through June 25; performance times vary • Where The Big Top, 3401 Washington Boulevard • How much $10-$65 • More info

In 1986, when Jack Marsh was 2 years old, he quite literally entered the ring of Circus Flora on the back of a Clydesdale, also named Jack. He worked his way up to the position of artistic director, and this year he was promoted to executive director for the nonprofit. But he’s still developing the show, and this summer’s production, “Undercover,” nods to timeless spy stories. “‘Undercover’ introduces the world’s top double agent, who faces an archvillain obsessed with world domination,” the circus says. “Our spy has plenty of helpful allies — but the villain has a team, too. Will good overcome bad … and how?” Looks like only Jack Marsh knows.