As the organization's annual Greek dramas always do, Genesius Guild's presentation of Electra begins with a processional. During this preamble, the cast members, accompanied by a majestic anthem, slowly make their way across the Lincoln Park stage, and those who'll be wearing the traditional headpieces of the period carry them at waist level, giving us an early peek at Ellen Dixon's costumes, Earl Strupp's masks, and, for the last time before the curtain call, the performers' faces. (Only the play's choral figures remain unmasked throughout the production.) It's a lovely touch, as reassuringly familiar as Genesius Guild's nightly T-shirt giveaway and the shrieking from the children playing on the neighboring swing sets.