As they look to the stars, what are they missing back home? The best of Helen Kane exists in space. If she doesn't go back up, she'll be consigned to a lesser version of herself on a planet that has also seen better days. Helen is an experienced astronaut with a NASA position and a struggling grown-up daughter who needs her but when, at 53, she is offered a place on the training programme for the first mission to Mars, the most realistic simulation ever, she cannot refuse a last chance to walk among the stars.