Tom Baker is now in his settled form in this story, and what a delight it is. This is a moody, atmospheric story, that keeps up the mystery and always finds ways to change the story. We go from there being no crew members and finding the dead Wirrn to introducing the crew and then Noah is taken over by the Wirrn. Then two more people are revived, and one is killed off quickly. Harry is trying to be heroic but is bumbling and sexist, and Sarah Jane is put through it with the Doctor talking her down to get her angry enough to persevere. The Tom Baker era is in full swing!