Interesting actor connections...
Anthony Ainley, who played the British secret service officer in the first episode, is probably best known for playing the arch-villain The Master in the 70's DOCTOR WHO series.
Michael Culver, who plays Luftwaffe Officer Brandt, is also well known for playing an Imperial Commander (Needa) who gets executed in THE EMPIRE STRIKES BACK.
And it's amazing the number of main actors and guest stars who played in the series I CLAUDIUS as well.
Feel free to add any other interesting ones you can connect.
I am - SUPERFLUOUS!!!