Sweeney has numerous television credits, including Z-Cars (1971), Rumpole of the Bailey (1975), Dixon of Dock Green (1976), Softly, Softly (1971–76), The New Avengers (1976), The Sweeney (appeared in the episodes "Taste of Fear" and "On the Run" in 1976), Return of the Saint (1978), Spearhead (1978–79), Citizen Smith as 'Speed' (1977–80), Fair Ground! (1983), Remington Steele (1985), Matlock (1987), Jack the Ripper (1988) as John Netley, Minder (1980–93), Pie in the Sky (1995), The Brittas Empire (1996), Trial & Retribution (1997), The Bill (1992–2006) and Casualty (1994–2007).