The latest play in Pier One Theatre’s summer season opens at 7:30 p.m. Saturday at the theater on the Homer Spit. It also plays at 7:30 p.m. Sunday July 18, 19, 20, 21, 27, 28, and Aug. 1, 4 and 9. 

Also showing this week is the second run of “Clean House,” showing at 7:30 p.m. Thursday and Friday. Tickets are $14 and available at the Homer Bookstore or the door. 

Pier One now accepts credit cards for payment. For reservations, call 235-7333.

Written by Adam Bock and directed by Marc Oliver, “Swimming in the Shallows” follows four friends living in Twig Beach, R.I., pondering materialism, marriage and relationships. Barb (played by Jessica Williams) reads an article about Buddhist monks who only own eight things in their lives and wonders if she should get rid of all her stuff. Meanwhile, Donna (Ruby Quarton) proposes to her longtime girlfriend, Carla Carla (Adi Davis), who says she’ll marry her, but only if she quits smoking. Donna’s gay friend, Nick (Jacob Mayforth), offers to help, while he tries to find a meaningful relationship of his own. Also appearing are Alder Fletcher and Marc Oliver.

“Swimming in The Shallows” starts Pier One’s new program of offering two plays a week. As the play premieres, the second run of “Clean House” continues. Also playing at 7:30 p.m. on Wednesdays through Aug. 7 is piano player and musician Johnny B.’s “Rhythm Of The North,” a show in songs, stories and images paired with video by Daniel Zatz and photography by Brad Lewis.