Ethnic tensions in France have been in the news this week, with the siege of the gunman Mohammed Merah, so award-winning South-African penman Craig Higginson’s new play seems really timely. First seen in this country at the Salisbury Playhouse, and opening last night at Theatre 503 in south London, this story about the relationship between a French-Congolese student and an English teacher during a hot Parisian summer is full of emotion, and ideas.

The Master and Margarita is a rare beast. Not only is it considered to be one of the greatest novels of the 20^th century, it also regularly tops reader-lists of all-time favourite books. So it’s no wonder that, since its publication in 1966, 26 years after the author’s early death, Mikhail Bulgakov’s Soviet-era masterpiece has attracted a steady stream of film-makers and theatre directors. But their adaptations have so often floundered that one genuinely fears for anyone fearless, or foolhardy, enough to take it on.

In 1888, the extremely weird Swedish playwright and novelist August Strindberg, the radical lefty son of a shipping merchant and a housemaid, wrote a play called Miss Julie about the conflict between the classes, between love and lust, between obedience and servitude, and between all the possible variations on these knotty and tortu(r)ous themes.

Melodrama is not something we accept easily these days, tittering gently as the gore runs, moving restlessly in our seats as heroes or villains declaim to the gallery. So all the more odd, on the surface, that Sweeney Todd is the most popular of Stephen Sondheim’s musicals. On the surface. Because, under the melodramatic posturing, Sondheim creates a cold, hard, bleak world.

Like many a regular theatregoer, I have a little list of classic plays that I’ve never seen, or even read. One of these is, or rather was, Errol John’s evocatively titled Moon on a Rainbow Shawl. Written in 1953, this definitive “yard play” was a historic breakthrough for Caribbean playwrights in Britain. So it was with considerable anticipation that I went to this revival, which opened last night at Britain’s national flagship venue. But can this classic stand up to scrutiny?

Was it the players, or the play, that has made a phenomenon out of One Man, Two Guvnors, the prize-winning comedy now on its third London theatre and preparing to hop the pond to Broadway next month? Well, bacon and eggs(!), it turns out there’s life aplenty in Richard Bean’s Goldoni rewrite yet, even without the star wattage of James Corden and the insanely arched eyebrows of Oliver Chris.

Polymath Philip Ridley is British theatre’s prince of imaginative writing. At the moment, he’s clearly on a roll, and this year his diary has been filing up fast. First, there was a majestic revival of his 1991 debut, The Pitchfork Disney, with a cast led by Chris New and the Channel 4 Misfits star Nathan Stewart-Jarrett, then there’s an upcoming London fringe revival of his 2005 shock-fest Mercury Fur and a national tour of Tender Napalm, his 2011 Southwark Playhouse hit, in May and June.

“Do you feel morally superior to the Taliban? Well, do you?” And we’re off, with another of director/choreographer Lloyd Newson’s interrogations of a taboo subject. DV8 Physical Theatre is 25 years old this season, yet if anything, it, and Newson, have become more challenging, not less as the years go by. Gone are the lyrically silent pieces of the 1980s, and instead movement is almost always now allied with talking; indeed, talking has become Newson’s main mode of communication, as his urgent need to vanquish our beliefs and replace them with his becomes ever stronger.

Mike Leigh’s Abigail’s Party: comedy classic or Who’s Afraid of Virginia Woolf? with added sneering? Ever since its first appearance on stage in 1977 and its subsequent record-breaking broadcast as a BBC Play for Today with an eye-widening 16 million viewers (not to mention those watching the subsequent DVD), there has been disagreement. Depending on your viewpoint, Lindsay Posner’s competent new production lives either up or down to your expectations.

Harley Granville Barker is hardly a household name, but he was a huge influence on British theatre today. During the Edwardian era, he promoted new writing at the Royal Court; he wrote plays such as The Voysey Inheritance, Waste and The Madras House, which have been successfully revived; he invented the modern idea of the director; he advocated permanent companies of actors; and he campaigned for a national theatre. Not a bad legacy. Now he is the subject of a new play, which opened last night, by American penman Richard Nelson.