The mission of the American Century Theater, or TACT, is to find and refresh American plays. In its first offering of the new year, it has done an excellent job of reviving George Kelly’s “The Show-Off,” first performed on Broadway in 1924.

TACT’s “The Show-Off” not only dusts off a theatrical relic, it also demonstrates what a brilliant dramatist and comic writer Kelly was, and it sheds light on a period of theater dealing with the era before the Great Depression.