“Outback” (**1/2 out of four) was a mildly tense melodrama about a young couple (Brendan Donoghue and Lauren Lofberg) who go for a vacation in the outbacks of Australia but find themselves stranded in the middle of the desert with no water and no food and no escape and have to preserve themselves (and their sanity) to stay alive. Sturdy movie in the vein of “127 Hours” and “Castaway” holds you in its grip without ever being riveting or fully engrossing. By the end, though, film does connect with you enough on a tragic level to make it worth seeing.