A sequel, "Quatermass II", was accordingly commissioned in 1955, but Reginald Tate died of a heart attack only a month before production was due to begin. With very little time to find a replacement, John Robinson was picked as the only suitable actor available. Robinson was uncomfortable about taking over from Tate and with some of the technical dialogue he was required to deliver, and his performance has been criticised as "robotic", although others such as Andrew Pixley in "Time Screen Magazine" have praised Robinson for doing compelling work after the initial episode of the serial.