George is busy preparing to launch the rocket on the anniversary of Bethan's death, when he suddenly has second thoughts. Diane is pregnant and Barney starts celebrating – but is it too soon? As the team face personal setbacks, can they achieve their dream of launching the first Welsh rocket into space? George is thrilled to get the council's permission to launch Bethan Two on the first anniversary of his wife's death. But fire officer McNulty fails the team on their safety inspection. Without it, they can't launch the rocket. In the midst of the build up, Diane discovers she is pregnant. Barney is thrilled and starts celebrating immediately, refusing to let anything spoil his elation - even McNulty's impossible demands that they put up safety fences and an observation deck on the beach. Angela's band is booked for their first gig. She wants George to be there and Tom wants his dad to help at the school food fair. George seems depressed and won't get involved with either of them. Suddenly he's not ready to let Bethan go, especially in front of the whole town. To the dismay of the team, George announces he is cancelling the launch and goes to find Tom and Angela. Barney appears, tearful after a visit to the hospital with Diane. George realises he must launch the rocket and move on. It is time for the team to gather on the beach to put their rocketeering to the ultimate test – and for George and his children to say goodbye.