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TO JUNE 1

Four interchangeable, conservatively clad actors with mustaches play milquetoast Henry Pulling in Giles Havergal’s winning adaptation of Graham Greene’s novel. But since doing quadruple duty is a way of allowing them also to limn Henry’s eccentric Aunt Augusta and the dozens of vicars, servants, policemen, bodyguards, generals’ wives, and girls in jodhpurs they encounter on their travels, nobody’s resting easy. Conrad Feininger needs only to shift one hip skyward and purse his lips to become Augusta in all her imperious glory, Marty Lodge is uproarious as both a goofy teenage flirt on the Orient Express and her CIA-agent father, Bill Largess handles supercilious Brit characters with aplomb, and Jack Kyrieleison makes a fetching wolf. Technical credits are fine, and if Jerry Whiddon’s production works a bit harder to earn laughs than did the splendid one that played at the Rep Stage a few months back, the only people likely to know are critics. The evening remains pleasant, erudite, and dryly amusing. At 8 p.m. Wednesday-Saturday, with matinees at 3 p.m. Saturday & Sunday at Round House Theatre, 12210 Bushey Dr., Silver Spring. $20-25. (301) 933-1644. (Bob Mondello)