In this episode... * Could a GPS sat nav work on the moon?  * A Pudding Squared returns.   * An APS announcement. * AND format news!  If you have any memory of how 'Is This Your Card' started please (please) let us know.  As always, if you've got a problem or a solution, hit us up on our website aproblemsquared.com. And if you want want even more from A Problem Squared, find us on Twitter and Instagram.