After graduating in 1969, he worked briefly as a stage manager in several Soho strip clubs before he joined the international cast of Victor Spinetti's Amsterdam production of Hair, in 1970, and subsequently played the role of Berger in the show's national tour of The Netherlands.
;[13] Alan Ayckbourn's Absent Friends,[14] Ray Cooney's Funny Money,[15] and The Rocky Horror Show returning to his old role of 'Frank-N-Furter'[16] in 1992 and 1994; he also starred in several pantomimes, including as Captain Hook in Peter Pan, as King Rat in Dick Whittington and as Abanazer in Aladdin.
[citation needed] Peter Blake's best-known role was the flamboyant and boastful Kirk St Moritz, resplendent in white suit, big collars and golden medallion, in the British sitcom Dear John (1986–87).
[17] As Michael Vincent in Penmarric (1979), Andy Evol in Agony (1979-1981), Dr Courant in Praying Mantis (1982), Carl Pierce in A Very Peculiar Practice (1986), Aubrey Owen in Dogfood Dan & the Carmarthen Cowboy (1988), David in Split Ends (1989), as Harvey in Fiddlers Three (1991) and as Ken Tate in EastEnders (2010).
[18] Blake guested on such television shows as The Squirrels, Out, Z-Cars, Minder, Shoestring, Shine on Harvey Moon, Bergerac, After Henry, Alas Smith and Jones, Ever Decreasing Circles, Just Good Friends, Boon, The New Statesman, Woof!, The High Life, The Bill, and Casualty, among others.