Steven Drewett

 — often credited outside Doctor Who as Steve Drewett and sometimes credited as Stephen Drewett — was the visual effects designer for the Doctor Who television stories Meglos and The Two Doctors. He was earlier an uncredited visual effects assistant on Terror of the Zygons. (INFO: Terror of the Zygons)

In addition to his Doctor Who work, he also was a visual effects designer on, the 1981 version of and Blake's 7.

As documentary subject
Drewett was a main interviewee on The Scene Sync Story, where he explained how Scene Sync was used to help make Meglos, as well as the utility of Barry Letts as an advocate of new technology.