Henry II and Thomas Becket
A good introduction to Henry II can be found here.
Part two of the documentary can be found here.
The climax is covered in part three which can be found here.
Eleanor of Aquitaine (fun).
The Film ‘Becket’ from 1964
Thomas Becket saying that he will be judged by the pope alone:
Excommunication of baron Gilbert scene
Assassination and penance