1960s In June 1960 Denison played the Rev James Morell in Shaw's 1898 play Candida at the Piccadilly and then Wyndham's; the run of 160 performances was the play's longest on record. Variety found the production "an eloquent tribute" to Shaw, and in particular praised Gray and Denison in the lead roles. After the London run the production toured. The couple appeared together in a revival of Heartbreak House at the Oxford Playhouse and then Wyndham's. After this they travelled to Australia, where Denison took over from Robin Bailey as Higgins in My Fair Lady in Melbourne. While in Australia he and Gray made a version of Village Wooing for television. They went to Hong Kong, appearing at the opening of the City Centre Theatre in August 1962 in a double bill of A Village Wooing and A Marriage Has Been Arranged, and then to Berlin, where the two gave a Shakespeare recital at the Berlin Drama Festival. Back in England Denison and Gray starred in the opening production of the Ashcroft Theatre, Croydon, The Royal Gambit, a play about Henry VIII and his wives, in November 1962. The stars received better notices than the play (Punch wondered why "so inept a play" had been chosen but thought Denison "looking fairly Holbein did his best to lighten this leaden Henry"). In the West End they headed the cast in a 1963 adaptation of E. M. Forster's Where Angels Fear to Tread, which ran for 262 performances. From April to July 1964 the couple toured England and Continental Europe in a Shakespeare programme called Merely Players. In London Denison appeared in Hostile Witness at the Haymarket Theatre (November 1964) and in An Ideal Husband at the Strand (December 1965), as Sir Robert Chiltern to Gray's Lady Chiltern. They appeared together at the St Martin's Theatre in December 1966 in On Approval. Denison's later West End roles of the 1960s were Mark in Happy Family (St Martin's, November 1967), Sebastian Fleming in Number Ten (Strand, November 1967), and Andrew Pilgrim in Out of the Question (Strand, October 1968), with Gray and Gladys Cooper. 1970s During the 1970s Denison toured in six productions: the 18th-century comedy of manners The Clandestine Marriage (1971); a comedy-thriller, The Dragon Variation (1973); a revival of a 1930s comedy, The First Mrs Fraser (1976); a new comedy, The Earl and the Pussycat (1976), a musical, Robert and Elizabeth