Quantum has extended the run for this challenging, thoughtful show through this Saturday.

J.T. Rogers’ play is somehow both intimate and grand, and this production is notable (as Quantum shows typically are) for its repurposed setting: the high-ceilinged, marble-columned first floor of Downtown’s The Carlyle, a condominium building that was built in 1906 as the Union National Savings Bank.

The sweeping space has been draped with huge cloths for atmosphere, but don’t miss the giant clock-face that’s pointedly left half-revealed.

The show’s composed of three curiously interwoven monologues. American visitors Lilian, June and Nathan each occupies the same hotel room in Rome, offering his or her version of life in one affluent but troubled family. But each occupies the room alone, in a slightly different time period, and while Lilian is June’s mother, Nathan is a family friend, and two family members — Lillian’s husband and her son — are conspicuous in their absence.

The play’s characters are of the jet-setting class, but Rogers’ script blends empathy with implied critique.

“It’s astounding what people will believe, if you dress respectably,” Lillian say knowingly at one point, a line that got a big laugh at one performance last week.

More cryptically, one character warns, “Don’t let the details of reality blind you to the truth.”

Here’s Michelle Pilecki’s review of the show for CP.

Boos says Quantum has never before extended the run of a show. (Though it’s fair to note that was originally booked for just a 17-day run, about a week less than is usual for the company.)

There are five more performances of Madagascar, starting with tonight’s. Tickets are $36-41 and are available here.