RADA-trained British character actor of stage and screen. During the 1950s, in particular, played many sly or menacing roles in B-movies. Not to be confused with Broadway singer and dancer Harold Lang (1920-1985).
At one time managed his own theatrical company.
He was also a well-known teacher of acting in London drama schools, and was seen at work in this field in the TV documentary The Class (1961), directed by John Schlesinger.