Gray appeared in many television programmes, her first appearance being in Love in Waiting in 1948. She had several roles in the 1970s including parts in Fawlty Towers, as the pediatrician wife of a Psychiatrist baffled by Basil's behaviour, The Crezz, Catweazle, and in the 1980s with Doctor Who story Arc of Infinity and the World War Two drama Tenko. She appeared as the Queen in the BBC sitcom The Black Adder (1983), with Rowan Atkinson as her son in the title role, and as Mrs. Palmer in Solo (1981–82), another comedy, this time with Felicity Kendal in the lead as her daughter.