It is a retrospective by Professor Sir Alfred Ayer of the development of philosophy in Oxford from the 1930's to 1972. Excerpts are included from some of the other films in the series which use conversations on a variety of topics between pairs of philosophers as a basic format. Among those appearing are Sir Isaiah Berlin, Stuart Hampshire, Professor Gilbert Ryle, Iris Murdoch and David Pears. Presenter: Professor Sir Alfred Ayer. Introduced by: Michael Chanan. Sound: Greg Bailey. Camera: Jack Hazan, Andrew Carchrae. Additional narration: Christopher Hitchins. Music: Henry Ward, Michael Nyman. Editor: Noel Chanan. Writer: Michael Chanan.