The Geffen Playhouse has announced four additional plays for the eight-play 2014-15 season.

The shows joining the lineup include the co-world premiere of the Geffen-commissioned “Switzerland,” penned by Joanna Murray-Smith. Also added to the program were the West Coast premieres of “The Night Alive,” written by Conor McPherson and helmed by Geffen artistic director Randall Arney; “The Power of Duff,” written by Stephen Belber and directed by Peter DuBois; and “The Gospel According to Thomas Jefferson, Charles Dickens and Count Leo Tolstoy: Discord,” written by Scott Carter.

“Each play that we’ve put into this season has something specific and singular about it,” Arney said in a statement. “Taken together, an undeniable theme emerges. These writers, and the characters they’ve created, have distinct voices, and the stories they tell explore how one voice can change the world. Through singing a song, writing a song, righting a wrong — each of these plays is a battle cry to raise one’s voice.”

These four additions follow the prior announcement of the first three shows in the lineup. One final production is expected to be announced in the near future.

With the schedule nearly complete, the Geffen Playhouse season will kick off the season Sept. 16 with the West Coast premiere of Tarell Alvin McCraney’s gospel music-infused play “Choir Boy” at the Gil Cates Theater.

Additional schedule and ticketing information can be found here.