Gray appeared in many television programmes, her earliest being "Love in Waiting" (1948). She had several roles in the 1970s including parts in "Fawlty Towers", as the paediatrician wife of a psychiatrist baffled by Basil Fawlty’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.