Owen and the 126 crew race to a gender reveal party gone horribly wrong, and a father/son trapped in a cave during a spelunking excursion. Meanwhile, Owen helps T.K. reconcile the past to help his future, Judd and Grace aid Judd’s aging father (guest star Barry Corbin) and Michelle learns the full truth about her missing sister, Iris, in the all-new “Awakening / Austin, We Have a Problem” two-hour season finale