Kristiana Rae-Colon’s hypnotically gorgeous and emotionally shattering drama Tilikum delves into the legacy of slavery, the obscene profits of the prison-industrial complex and (not incidentally) the tragic life of the Seaworld’s longtime star attraction, the orca Tilikum. Gregory Geffrard’s galvanizing performance as Tilikum is backed by a percussive soundscape and shimmering projections that capture the beauty of the ocean depths. In all, Tilikum is of the best shows of the year. It runs through July 29 in a Sideshow Theatre production at the Victory Gardens Theater, 2433 N. Lincoln Ave.; $15-$30. Visit Victorygardens.org.