The Old Watch invades Larry’s farm, leaving the Girls with one chance to get home to 1988.
Tiff confronts her adult self about the choices she’s made and KJ tries to help Mac grapple with her future as Larry and Erin call for back-up.
Adult Erin leads a daring mission home to 1988 that takes an unexpected turn, leading the girls to KJ’s house and a big secret about her future.
Larry may have a way for the girls get home to 1988…but it’s going to require a lot of adult Erin…and Mac may not want to go home to her old life after spending time with Dylan.
Mac reunites with the grown-up version of her brother Dylan and is stunned to learn how her family turned out. Tiff, KJ, and the Erins meet a stranger who might be the ticket back to 1988.
It's the day after Halloween in 1988 when four young friends accidentally stumble into an intergalactic battle and find themselves inexplicably transported to the year 2019. When they come face-to-face with their adult selves, each girl discovers her own strengths as together they try to find a way back to the past while saving the world of the future.