[2] From 1960, Lang, a devotee of Stanislavski, also taught acting at Central School of Speech and Drama; and director John Schlesinger filmed his work in a documentary, The Class, for BBC TV's Monitor, in 1961.

[5] (1952) He acted in Jean Anouilh's play, "Thieves' Carnival", at the Arts Theatre Club in London, England with John Laurie, Robin Bailey, Wyndham Goldie, Judith Furse, Maxine Audley, David Bird, Gerald Harper and Tutte Lemkow in the cast.

(November 1955 – December 1955) He played Edmund and Borachio respectively, in William Shakespeare's plays, "King Lear" and "Much Ado About Nothing", at the Shakespeare Memorial Theatre in Stratford, England, and on a UK and European tour; with John Gielgud, Peggy Ashcroft, Moira Lister, Helen Cherry, Anthony Nicholls, George Devine, Raymond Westwell, David O'Brien and Richard Easton in the cast.

[10] (March 1959) He acted in Thomas Otway's translation of Molière's play, The Cheats of Scapin, at the Lyric Theatre in Hammersmith, London, England with Maxwell Shaw, Peter Sallis OBE, Patrick Wymark, Fulton Mackay and Helen Montagu in the cast.

[12] (1965) He directed William Shakespeare's play, "As You Like It", at the Open Air Theatre in Regents Park, London, England with Ann Morrish, Gary Raymond, Phyllida Law, Edward Atienza, John Justin, Andrew Downie and Alfred Burke in the cast.