Just a hare above "bad". Clumsy dialogue, that kid from Madagascar got eaten by birds and no one ever seemed to notice, and I was sure this one was going to end up a 2 parter, but then they solved it all in the last 4 minutes.
How the heck did Graham survive his cancer treatments and live with a nurse for years and never heard the word "pathogen" before? Let one of the kids ask "what's that?" and have Graham try to explain it with the Doctor/other scientist there expanding the definition as required. Makes the companions look completely uneducated if not one of them can figure that one out.
At least they gave Yaz something to do this week.
