The theatre gods rained down not fire and pestilence, but a 45-minute technical delay on opening night of this substantially revised musical – a stage adaptation of the 1998 DreamWorks animated movie. But nothing could entirely halt this juggernaut; fittingly, for a show that earnestly values persistence and the unstoppable power of the epic.

This latest musical theatre exercise in “geek chic” has been an American phenomenon: a show propelled by social media that developed a rabid fan base taking it all the way to Broadway last year.

There are any number of ways to perform A Number, Caryl Churchill’s bleak and beautiful play about a father and three of who knows how many of his genetically cloned sons. Since it first opened at the Royal Court in 2002, this hourlong two-hander has been staged in London with some regularity, as often as not with actual fathers and sons (Tim and Sam West, John and Lex Shrapnel).

The Black Lives Matter movement is such an important international protest that it is odd how few contemporary plays even mention it. Since the hashtag #BlackLivesMatter has been around since 2013, following the acquittal of George Zimmerman who shot African-American teenager Trayvon Martin in February 2012, there is little excuse.

Not the musical then, worst luck. How timely it would have been to mark Jerry Herman's passing with a celebration of a great achievement. Just how brilliantly the pathos and panache of his score lift Jean Poiret's long-running 1970s farce about a gay couple and their St Tropez drag club having to "straighten up" for family values is only emphasised by this ultimately threadbare adaptation by Simon Callow.

What joy it is to welcome this offshoot of the television series to the West End stage – complete with several of that show's cast, plus a few new additions. Ben Elton has fashioned an original story that picks up in 1605, a decade after where the third series left off (with the death of William Shakespeare's son, Hamnet), and two years into the reign of King James.

Queer people of colour face a double discrimination: racism and homophobia. Against this sickness of negation and stupidity one of the best antidotes is a culture of celebration. And in this theatre can play its part.

It’s not uncommon for playwrights to begin their careers by writing what they know, to co-opt a frequently quoted precept about authorial inspiration. So it’s among the many fascinations of Leopoldstadt that Tom Stoppard, at the age of 82, should have written his most personal play and also, very possibly (and sadly), his last.

Caryl Churchill, Britain's best living playwright, is enjoying a spate of high-profile revivals of her classic work. Last year, the National Theatre staged her Top Girls, and an upcoming production of A Number is coming soon to the Bridge Theatre.

Ibsen's Nora slammed the door on her infantilising marriage in 1879 but the sound of it has continued to reverberate down the years.