Richfield's other credits included roles on No Hiding Place, Gideon's Way, Danger Man, Dixon of Dock Green, The Baron, Adam Adamant Lives!, Z-Cars, The Avengers, Champion House, Out of the Unknown, UFO, Crossroads, Bergerac and All Creatures Great and Small. However, he is best known for playing Inspector Mornay on Interpol Calling, Steve Gardiner on The Odd Man, Mr Pomeroy on R3 and Frank Chapman on Harriet's Back in Town.