Show is Underground initiative's first offering

The inaugural production in the Roundabout’s new black box space, “Speech & Debate,” has proven popular enough to prompt a two-week extension.

Show is the first offering of the Roundabout Underground initiative, which aims to produce smaller-scale, riskier fare in the nonprofit org’s new 62-seat venue.

Stephen Karam’s play, about three Oregon teens linked by a local sex scandal, won largely positive reviews when it opened last month. Jason Moore directs.

New closing date for “Speech & Debate” is Dec. 30.

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