For 22 years until his death, he was a panellist in the long-running BBC Radio 4 panel comedy game show I'm Sorry I Haven't a Clue, which he joined as a regular team member in the third series in 1974. In its later years, the show's wealth of silliness, smut and punning was drawing audiences of up to a thousand people for its recordings. In 1990 he teamed up with his co-panellist Barry Cryer in their own show Two old Farts in the Night, performing to full audiences at the Edinburgh festival, the Royal Albert Hall and the Festival Hall, touring the country irregularly until Rushton's death.
For 22 years until his death he was a panellist in the long-running BBC Radio 4 panel comedy game show I'm Sorry I Haven't a Clue, which he joined as a regular team member in the third series in 1974. In its later years, the show's wealth of silliness, smut and punning was drawing audiences of up to a thousand people for its recordings. In 1990 he teamed up with his co-panellist Barry Cryer in their own show Two old Farts in the Night, performing to full audiences at the Edinburgh festival, the Royal Albert Hall and the Festival Hall, touring the country irregularly until Rushton's death.