A wise move, Ted.
I have memories of the H M Theatre, Aberdeen - a splendid Matcham theatre - where the safety curtain - it used to be obligatory to lower it once during the evening, in the presence of the audience - was inscribed, beneath the advertisements, "For thine especial safety" (Hamlet?).
Again, I have to go down memory lane, as I saw the original production of 'The Caretaker' at The Arts Theatre, before it transferred to the Duchess Theatre for a long run. Shattered to check and find that I saw it in April 1960. Let me not think on't. A peerless cast: Donald Pleasance, Peter Woodthorpe and Alan Bates. I saw it two or three times and how well they sustained their performances.
The 1963 film version has many qualities, although Robert Shaw (a good actor) couldn't replace the lost world which Peter Woodthorpe mined so easily. Most of us knew little about the barbarity of electro-convulsive therapy (ECT) although it was widely practiced at the time. Subsequently, Aston is forever trying to connect with gadgets. A recent biography of Alan Bates, Otherwise Engaged -The Life of Alan Bates - by Donald Spotto, mentions that the budget was £30,000, donated by film and west-end luminaries so the fees for the cast would probably be what we used to call 'taxi money'. It was filmed, entirely on location, except for a few exteriors, in an abandoned, unheated house at 31 Downs Road, Hackney, and completed in six weeks. Spotto adds, 'With this picture Alan again demonstrated his mastery of the differences between stage and film acting - the size of gestures, the variety of tonal nuance, the need to convey character by inference.' Of course, the film is Pleasance's in so many ways. I've spoken to an actor who played opposite him in Anouilh's 'Poor Bitos' at the Duke of York's Theatre. Your experience will have taught you about the importance of eye contact, in performance, and how the thought processes go, outwards, from the eye. A po-faced colleague told me that the reverse applied in the case of Pleasance and this may explain his capacity to suggest the disturbed, or unhinged. He was certainly remarkable, albeit a trifle scary.
I have reservations about the film opening-up for the occasional exterior. The play is claustrophobic and Aston's monologue about the effects of ECT is climaxed by a shattering blackout at the end of Act 2 which was terrifying in the theatre. In 2002, BBC 4 did a Pinter season, over 2 weeks, - all from earlier recordings, often with original casts - and the longer nights are encouraging me to go from off-air video to DVD. I'll open a separate thread with full details of this season and, if you'd like to see, say, 'The Caretaker' again, in less traumatic circumstances, I'll be more than happy to do you a copy with my compliments.