Stowaway review: Sluggish yet thrilling, but this is no Gravity! One of the biggest shortcomings of the movie is the editing by Ryan Morrison. It could have been way crisper and the runtime could have been shortened by at least 10 minutes For the unversed, stowaways are people who travel secretly in any form of transportation like buses, trams, trains, aircrafts, etc. Joe Pennaâs Stowaway takes it a notch higher by getting a stowaway passenger in a spaceship travelling to Mars for a two-year mission. I know what youâre thinking â itâs absurd to even think of a situation like this! After all, the numerous security checks that happen before the reverse countdown of a spaceship begins, makes this situation pretty much of an impossibility. They are NASA and not your local Nasha-Mukti Kendra for Peteâs sake!