Apollo 23 Spacecraft

The Doctor and Amy arrive at a shopping centre much to The Doctor’s disappointment. When arriving they discover that an American astronaut has appeared out of thin air. They both decide to materialize to the Moon which they successfully do and find the secret Base Diana. Investigating, they learn of a plot by the evil Talerians to take over the Earth by possessing human bodies. The Doctor ends up trapped on Earth and working with secret government officials, manages to return to the Moon on Apollo 23, there having secretly been Apollos 18 through 22 before a link was established between Earth and the Moon that allowed instantaneous travel before sabotage caused it to break down, causing the spaceman to appear.