[7] He also played Randolph Mepstead, the older brother of David Jason's character in the pilot episode of the mid-1970s series Lucky Feller.

He stated that despite his 50 years of professional acting, his tombstone will probably read "Here lies Nicky Henson – he was in one episode of Fawlty Towers".

[8][9][10][11] Henson's film appearances include Witchfinder General (1968), There's a Girl in My Soup (1970), Mosquito Squadron (1970) and Psychomania (1973).

On stage, Henson played many Shakespearean characters (including a period with the Royal Shakespeare Company from 1977) and had leading roles in Look Back in Anger, Man and Superman, Rosencrantz and Guildenstern are Dead, She Stoops to Conquer, Noises Off and others.

He appeared as Mordred in the original 1964 London version of Camelot opposite Laurence Harvey as King Arthur.

Henson made his Broadway debut in a production of Oscar Wilde's An Ideal Husband, opposite Stephanie Beacham.

[12] The marriage ended after Henson began an affair in 1974 with actress Susan Hampshire, his co-star in several stage productions.