Series 3 Episode 7: 42

Summary:
Martha and the Doctor land on a spaceship but they soon find out, that the ship is on it's way into a sun and they are stuck because they can't reach the Tardis anymore. There are only 42 minutes left to restart the engines of the ship but there seems to be something else on board that is not human. After a lock-down Martha helps to get to the front of the ship which isn't so easy because the doors are locked with passwords. She calls her mother to help her a couple of times but when the alien reaches her, she is locked into an escape pod. The Doctor can save her but now the alien is inside of him and he doesn't know how long he can resist. Will the ship fall into the sun or is the Doctor able to come up with a plan?

I think this is another great episode for Martha because this time she has to save the Doctor and not the other way round. It's a bit scary to see that the Doctor can be possessed by another alien lifeform, I just didn't think that would be possible. The episode has an interesting story and it feels a bit like 24 because they only have 42 minutes to save themselves. So, it's an episode in real time. The Doctor seems to like spacesuits because he is wearing one in this episode again but it suits him. I love the modificated phone every companion has and I would like to have one of these myself. Would be cool when you could phone everywhere and don't have to pay for it. :) 42 is a great episode with interesting aliens and a quite simple resolution for the problem but also some deaths that could have been prevented.