 This production represents the last of the three occasions that the  three great British theatrical knights, Laurence Olivier (qv),  John Gielgud (qv) and Ralph Richardson (I) (qv) all appeared  together on screen. As their characters appear to be fictional, and  all have names which begin with "Pf", this does not appear to be  fortuitous casting, but a deliberate whim of the director. The  previous appearances of the three knights were in the films  _Richard III (1955)_ (qv) and _Oh! What a Lovely War (1969)_ (qv).