This "speculation of jealousy, madness and the brothers Booth" will continue through Oct. 10.

Directed by Kim Weild, the cast comprises Margaret Copeland, Erik Heger, Andrew Veenstra and Brian Wallace.

An Error of the Moon, according to press notes, is "a fictional portrait of the brothers Edwin and John Wilkes Booth, the rock stars of their day. Edwin tells his tale of a man consumed by sexual jealousy, of bitter sibling rivalry, and the mad obsession that sparked the assassination of Abraham Lincoln."

The production features scenic design by Steven Capone, costume design by Alixandra Gage Englund, lighting design by Charles Foster, sound design by Christian Frederickson and projection design by C. Andrew Bauer. Fight direction is by Rick Sordelet.

Producers are Theater 21 and CRC Productions. Show times are Tuesdays at 7 PM, Wednesdays-Fridays at 8 PM, Saturdays at 2 PM and 8 PM and Sundays at 3 PM.

Tickets are $50 and are available through www.Telecharge.com or (212) 239-6200.

For more information visit www.AnErrorOfTheMoon.com.