): I mean the Krynoid is about to eject hundreds of embryo pods. CHASE: The sergeant's no longer with us. DOCTOR: Or possessed. He's in the garden. Let him have it. Sarah and I will go this way. Scorby, bullets and bombs aren't the answer to everything. THACKERAY: And you haven't made contact with the Doctor?
Plan: A: Chase; Q: Who is under Krynoid control? A: The Doctor; Q: Who suspects possession of Chase? A: the bigger picture; Q: What did the Doctor consider when he ordered the mansion bombed? Summary: Chase is obviously under Krynoid control. The Doctor suspects possession but, with the mountainous Krynoid nearing maturity and whacking the mansion to pieces, he concerns himself with the bigger picture and orders the mansion - with Sarah and him still inside - to be bombed.