Roger James Cook (6 April 1943 – 13 June 2026) was an Australian and British investigative journalist and television broadcaster. In 1998 he received a BAFTA special award "for 25 years of outstanding quality investigative reporting", for his programme The Cook Report.

Cook's parents were New Zealanders. He was born in Auckland, New Zealand, but was brought up in Australia, and began his career with the Australian Broadcasting Corporation as a reporter and newsreader on both radio and television.

In 1968 Cook moved to the United Kingdom where he joined BBC Radio 4's World at One and its sister programme, The World This Weekend. He subsequently worked on several other BBC radio and television programmes, including PM, Nationwide, and Newsnight.

In 1973 Cook created and presented the Radio 4 programme Checkpoint, which specialised in investigating and exposing criminals, con-men, injustice and official incompetence, often confronting the subjects of the investigation on tape. In 1979 Cook was threatened by Don Arden, father of Sharon Osbourne, when he started to look into the business practices of the notorious rock manager after Cook used the legal battle between Lynsey de Paul and Arden as a springboard for his investigation. Arden told Cook, "When you fight the champion, you go 15 rounds. You've got to be prepared to go the whole way ... I'll take you with one hand strapped up my a***. You're not a man, you're a creep."

In 1981, during a Checkpoint report for Newsnight, Cook was filmed being violently assaulted by a Brighton antique dealer after confronting him about selling fake antiques. Cook suffered three cracked ribs. He later said: "Mr Harris invited me to step outside and talk things through, but his means of communication proved to be a metal bar".

In 1984 Checkpoint transferred to television for one series of four episodes, broadcast on BBC1.

In 1985 Cook moved from the BBC to Central Independent Television, Birmingham, and in 1986 was in charge of one series of the live debate show Central Weekend. In 1987 he launched a new TV series, The Cook Report, a higher-budget version of his radio programme, with a large and dedicated research team, which enabled it to operate on an international scale. The show became known for its filmed 'stings' and for Cook's frequent confrontations with his targets, during which he (and sometimes the film crew) often suffered verbal and physical abuse (with Cook getting injured on a number of occasions). Cook was described in the British press as "nemesis in a leisure shirt", "a cross between Meatloaf and the Equaliser", "the bravest/most beaten-up journalist in Britain" and "The Taped Crusader".

In a 1987 episode of the programme, "Worse Than The Mafia", Cook tackled Northern Ireland protection rackets. Cook posed as a business man while Ulster Defence Association man Eddie Sayers was filmed attempting to extort money from him. Sayers was later arrested and sentenced to 10 years in prison at Belfast Crown Court.