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.

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.

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.

Desperate to find a way home, Tiff leads the girls to her adult self, who accomplished so many of her childhood dreams but she isn’t everything that was expected. Together they work to decode Larry’s ledger as the Old Watch close in.

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.

The Old Watch invades Larry’s farm, leaving the Girls with one chance to get home to 1988.