candidate: It 's now the post war period with the main character played by Mark McManus . < br > 'Episodes' < br > A New World ( Original Air Date—16 May 1974 ) Legacy ( Original Air Date—23 May 1974 ) Shape Yourself Round It ( Original Air Date—30 May 1974 ) Under a Cloud ( Original Air Date—6 June 1974 ) Head and Heart ( Original Air Date—13 June 1974 ) Stay Single and Live for Ever ( Original Air Date—20 June 1974 ) Credit ( Original Air Date—27 June 1974 ) Sins of the Fathers ( Original Air Date—4 July 1974 ) The World as It Is ( Original Air Date—11 July 1974 ) Land ( Original Air Date—18 July 1974 ) Half a Loaf ( Original Air Date—25 July 1974 ) Two Steps Forward , One Step Back ( Original Air Date—1 August 1974 ) Moving On ( Original Air Date—8 August 1974 )