In search of the Doctor, an antimatter creature attacks UNIT and the Doctor is forced to send an SOS to his people, the Time Lords, but they have troubles of their own.
Why does a clown want to murder Steed? Cathy joins a circus to find the answer.
The Deputy Sheriff tries to bamboozle Friar Tuck in order to prove that the priest colludes with the outlaws. To corner him, the Deputy Sheriff has Friar Tuck denounce the outlaws and take an oath in front of the Archbishop that binds him to secrecy.