"Don't Interrupt" did actually sound quite intriguing. Robert Stevens did do some very good and more episodes for 'Alfred Hitchcock Presents', there were disappointments such as "Toby", "Shopping for Death" and particularly "The Hidden Thing" as far as previous episodes. But they were far outweighed by excellence such as "Our Cook's a Treasure", "One for the Road", "The Glass Eye", "Heart of Gold" and "The Motive". Have also loved Cloris Leachman since her magnificent performance in 'The Last Picture Show'.
Unfortunately "Don't Interrupt" was a big disappointment in nearly every area. Very sad to see Season 4 go so quickly from one of its best episodes (and one of my favourite 'Alfred Hitchcock Presents' episodes) "Poison" to a very strong contender for its worst in "Don't Interrupt". It is Stevens' worst along with "The Hidden Thing" (not entirely sure which is worse of the two), the worst 'Alfred Hitchcock Presents' episode since "Sylvia" and one of my least favourite outings of the entire series.
There are a few good things. Leachman does valiant work in her role and does perform with the right amount of intensity. Hitchcock's bookending is typically droll and where the episode is easily at its most interesting.
It looks quite nice and moody in the photography and the theme music is classic.
However, so many things are poorly done. The pacing is very dull with no tautness at all, which made the episode feel very dragged out and flimsy. The very thin story badly suffers from a complete lack of suspense or any kind of atmosphere and even more so from next to nothing not making sense. The ending leaves more perplexed questions than answers, with a very anti-climactic feel too.
Stevens' heart to me was clearly not in it, even "The Hidden Thing" didn't have direction this leaden and going through the motions-like. The production values are on the whole cheap, while the rest of the cast overact to overwrought melodrama level. "Don't Interrupt's" very close second biggest failure, first being everything in the story, is the excessive unlikeability of all the very one dimensional characters that are absolutely impossible to root for. A big problem for a story where one is clearly supposed to. The boy agreed is especially true to this, truly irritating.
Overall, very weak. 3/10.