The 1976 adaptation of The Picture of Dorian Gray with Jeremy Brett as Basil Hallward.
Basil was one of my favourite characters in the novel so seeing Jeremy play him actually healed my soul a little bit.
However, did you know Jeremy Brett actually portrayed Dorian himself in The Picture of Dorian Gray (Season 5, episode 20) episode of Armchair Theatre in 1961? Haven't found any footage, but there are some photographs:
Pictures taken from Pinterest.
Edit: Aaaaand the reason why no footage can be found is because there is none! Zilch! It's disappeared without a trace! According to Wikipedia, many episodes of Armchair Theatre were lost and this particular episode was amongst them. Jeremy Brett's Dorian... completely lost to time... *sheds a tear*
At least we have these wonderful pictures to prove it happened!
Apparently a total of 258 episodes of Armchair Theatre are missing due to the archival policies of television at the time. The entire first series is gone.
"I want to speak of your father. You know, he was a very wise and brilliant man and I know how you felt when you learned of his death."
"And his life's work destroyed."
"Oh, no, no, no, no, I wouldn't say that. His work will go on, only not quite in the same way. But I don't believe that man was made to be controlled by machines. Machines can make laws, but they cannot preserve justice; only human beings can do that."