I saw this on when I was at school back in the 70's, when it was first shown (twice a week), and when it was repeated in the 80's. I have since bought the videos. This dedication must go some way to show how incredibly powerful the acting and script are in this portrayal of Imperial Roman life from Augustus to Nero. Personally I can't wait to see them restored on DVD, complete with cast interviews.
The power of this series lay in it's use of small sets, making the intrigue far more personal and believable. Poison dripped from every word, look and gesture of Sian Phillips as Livia. John Hurt was incredibly disturbed & disturbing as Caligula, and Derek Jacobi was amazing as Claudius, surviving when all around fell.
The biggest problem with I Claudius is that the acting and story are so powerful, I often find myself thinking of the actors Roman characters when I see them in other things.
This is a must watch piece of classic BBC drama, with the cream of British acting talent.