Waller's other credits included Softly, Softly: Taskforce, The Onedin Line, On the Buses, Doctor in Charge, Dixon of Dock Green, Churchill's People, Doctor on the Go, Z-Cars, The Liver Birds, All Creatures Great and Small, Juliet Bravo, Minder and Coronation Street. However, he is best known for playing Old Mr Henry Grace on Are You Being Served?, Ferret on Big Deal and the Grandad on Bread.