During the summer of 1934 Evans appeared in A Midsummer Night's Dream at the Open Air Theatre in London.

[1] He played many parts in British films of the 1930s, then during the Second World War was a conscientious objector, serving in the Non-Combatant Corps.

[4] After the war, Evans's best known film roles were for Hammer Studios: he played Don Alfredo Carledo in The Curse of the Werewolf (1961) and Professor Zimmer, an often inebriated vampire-hunter, in Kiss of the Vampire (1963).

[9] He also appeared in three episodes of The Avengers, in The Champions, The Saint, and Randall and Hopkirk (Deceased) ("When did You Start to Stop Seeing Things?

[10][11] The following year, he played Sir Iain Dalzell, a leading character in the BBC TV series Codename (1970).