Maggie Smith won an Academy Award for her portrayal of Jean Brodie. I think that Geraldine McEwan's Brodie is easily superior.
I saw this in the US on Public Television in the late 70's and have been looking for the series for over a decade. The series has seven episodes, each centered around the brilliant, inspiring, and deeply troubling Jean Brodie. She is both the best teacher a student could ever have and a woman without ethical boundries and who imposes her aspirations on helpless schoolgirls.
The best of the seven episodes is "Giulia," which shows the character of Miss Brodie at her worst and the McEwan's performance at its best. The last episode is the series' weakest, especially when the "Brodie girls" are shown to be petty and cruel.
(US purchasers should be aware that this is in PAL format, so you'll need a zone-free DVD player.)