In Dreams - [s6e12]

The episode uses Roy Orbison’s song "In Dreams" to represent Grace’s manifestation of a hopeful future—a mental sanctuary to help her through the trauma of labor in a wasteland.

Grace believes that by waking up and giving birth, she will eventually die but ensure Athena's survival and the bright future she saw. [S6E12] In Dreams

As Grace explores this "perfect" world, she begins to hear Morgan’s voice from the real world, where she is unconscious following an explosion. She realizes she must wake up to deliver her baby, believing that the daughter she met in the dream is the key to bringing this peaceful future to life. The episode uses Roy Orbison’s song "In Dreams"