Hot Tub Time Machine (2010)

Hot Tub Time Machine is a 2010 American science fiction adult comedy film directed by Steve Pink. Four guy friends, all of them bored with their adult lives, travel back to their 1980s teen-hood, courtesy of a time-shifting hot tub. It stars John Cusack, Craig Robinson, Clark Duke, Kellee Stewart, Rob Corddry, Crystal Lowe, Lizzy Caplan, and Collette Wolfe. The film also features stars from 1980s films such as Chevy Chase, Crispin Glover, and William Zabka.

A malfunctioning time machine at a ski resort takes a man back to 1986 with his two friends and nephew, where they must relive a fateful night and not change anything to make sure the nephew is born.