Reverse The Polarity

So it seems that this has become the catchphrase that is most associated with the Third Doctor's era. And the phrase "reverse the polarity of the neutron flow" only showed up twice, once in The Sea Devils, and then in The Five Doctors.

Doctor Who: The Five Doctors (Story 130)
The Five Doctors (Doctor Who #81)
Doctor Who: Terror of the Autons (Story 55)