Christopher Magnus Howard Pedler (11 June 1927 – 27 May 1981) was an English medical scientist, parapsychologist, and science fiction screenwriter and author.

Pedler was the head of the electron microscopy department at the Institute of Ophthalmology, University of London, where he published a number of papers. His first television contribution was for the BBC programme Tomorrow's World.

In the mid-1960s, Pedler became the unofficial scientific adviser to the Doctor Who production team. Hired by producer Innes Lloyd to inject more hard science into the stories, Pedler formed a particular writing partnership with Gerry Davis, the programme's story editor. Their interest in the problems of science changing and endangering human life led them to create the Cybermen.

Pedler wrote three scripts for Doctor Who: The Tenth Planet (with Gerry Davis), The Moonbase and The Tomb of the Cybermen (also with Gerry Davis). He also submitted the story outlines that became The War Machines, The Wheel in Space and The Invasion.

Pedler and Davis devised and co-wrote Doomwatch, a science fiction television programme produced for BBC1. The programme, which ran for three seasons from 1970 to 1972 (comprising 37 50-minute episodes plus one not broadcast), covered a government department that worked to combat technological and environmental disasters. Pedler and Davis contributed to only the first two series.

Pedler and Davis re-used the plot of the first episode of the series, "The Plastic Eaters", for their 1971 novel Mutant 59: The Plastic Eater.

Pedler's non-fiction book The Quest for Gaia gave practical advice on creating an ecologically sustainable lifestyle, using James Lovelock's Gaia hypothesis.

Pedler was the father of the novelist Carol Topolski. His other daughter, Lucy, is an ecological architect who practices sustainable design. Interviews with his daughters can be found on the commentary track of episode one of the BBC's Doctor Who DVD release of The Moonbase.