Jack Klaff plays Einstein, Bohr, General Smuts, Gandhi, Hitler, Stalin, Wittgenstein, Bertrand Russell, Kennedy, Khrushchev, Freud, Jung, Einstein's daughter, Lady Ottoline Morrell, Jackie Kennedy-Onassis, Margarete Buber-Neumann and the psychoanalyst Sabina Spielrein.
"Klaff's time has come ... he may yet change the world." (Neil Cooper, Herald). "...takes the one-man show to new heights. He renders these titans with awesome energy, intellectual fireworks and warm humour" (Time Out). Klaff won a Herald Archangel Award in 2010.