Well, honestly this is more a cameo appearance. Then virtually unknown (well, not to theatre goers, of course) Alan Rickman and his three lines in exchange with Sir Alec Guinness in the brilliant TV six-parter Smiley's People. 1979
A promotional video for John Gabriel Borkman can be viewed below with some unseen photos featuring Alan. Video footage provided by the Abbey Theatre in Dublin, Ireland. All rights reserved to the Abbey Theatre, Dub