Dennis Howard Marks (13 August 1945 – 10 April 2016) was a Welsh drug smuggler and author who achieved notoriety as an international cannabis smuggler through high-profile court cases.
 At his peak he claimed to have been smuggling consignments of the drug as large as 30 tons, and was connected with groups as diverse as the CIA, the IRA, MI6, and the Mafia.
 He was eventually convicted by the American Drug Enforcement Administration and handed a 25-year sentence to be served at Terre Haute; he was released in April 1995 after serving seven years.
 Though he had up to 43 different aliases, he became known as "Mr Nice" after he bought a passport from convicted murderer Donald Nice.
 After his release from prison, he published a best-selling autobiography, "Mr Nice", and campaigned publicly for changes in drugs legislation.
Image Diffusion International (IDI) is a Quebec production company founded by Anne-Marie Losique and Marc Trudeau in 1995.
 Based in Montreal, it specializes in producing entertainment and lifestyle television magazines.
 Its shows are sometimes Quebec-based in French and sometimes edited in two versions, French and English.
 Some of their programmes are shot in the studios of MusiquePlus, a music television station on which many IDI shows are aired.
 IDI's productions are broadcast on multiple networks across Quebec and Canada.
 Its show "Sex-shop" was sold to French television station XXL.
 Subject matter of their programs include cinema, travel (including gay tourism) and nightlife.
 A number of their television shows also feature the sex industry.
Ice Hockey Hair is an EP by the Welsh alternative rock band Super Furry Animals, released in 1998.
 The record contains four songs which the band felt did not fit in with either their previous album, 1997's "Radiator", or its follow-up "Guerrilla".
 The title track refers to an alternative name for the mullet hairstyle.
 The EP's opening song, "Smokin'", was commissioned by British television station Channel 4 for a programme about sloth presented by Howard Marks.
 "Ice Hockey Hair" was later included on 'greatest hits' compilation "", issued in 2004, while "Smokin'" appeared on 1998's B-side and rarities compilation "Out Spaced".
ITV Channel TV, previously Channel Television, is a British television station which has served as the ITV contractor for the Channel Islands since 1962.
 It is based in Jersey and broadcasts regional programme for insertion into the network ITV schedule.
 Until November 2011, Channel Television was one of four ITV companies independent from ITV plc alongside the two STV regions in Scotland and UTV in Northern Ireland.
 The station has been owned by ITV plc since the licence was transferred to ITV Broadcasting Limited in March 2017.
Cannabis Planet is an American television program created by Brad Lane with the intent to promote the benefits of marijuana.
 According to producers, the show covers "the merits of the cannabis plant (medicinally, industrially, agriculturally), and the benefits this plant brings to planet earth, mankind and the United States."
 The Los Angeles-based program first broadcast in July 2009 on the television station KJLA, which airs throughout most of Southern California.
NVTV, also known as Northern Visions Television, is a local community television station based in the city of Belfast.
 It is operated by the Northern Visions media and arts project, and although some staff are employed by the station, most involved are volunteers.
 NVTV is now the only local community station in Northern Ireland.
Marc Scott Emery (born February 13, 1958) is a Canadian cannabis activist, entrepreneur, and politician.
 Often described as 'the Prince of Pot', Emery has been a notable advocate of international cannabis policy reform.
 He has been active in the New Democratic Party, the Freedom Party of Canada, the Unparty, the Marijuana Party of Canada, and the Conservative Party of Canada as well as the British Columbia Marijuana Party, and the Green Party of British Columbia.
Samuel John "Sam" Kydd (15 February 1915 – 26 March 1982) was an English actor.
 His best-known roles were in two major British television series of the 1960s, as the smuggler Orlando O'Connor in "Crane", and as a recurring character in "Coronation Street".
 An early film was "The Captive Heart" (1946), where he had a non-speaking role as a POW.
The "Celebrity Big Brother" racism controversy was a series of events related to incidents of racist behaviour by contestants on the British television series "Celebrity Big Brother 5", shown on British television station Channel 4.
 The incidents centred on comments made by contestants on this reality television show, most notably Jade Goody, glamour model Danielle Lloyd, and singer Jo O'Meara, which were directed towards Indian actress Shilpa Shetty.
 The screening of these comments on UK television resulted in national and international media coverage, responses from the UK and Indian governments, and the show's suspension during the 2008 season.
Michael Richard Jackson (born 11 February 1958) is a British television producer and executive.
 He is notable for being one of only three people to have been Controller of both BBC One and BBC Two, the main television channels of the British Broadcasting Corporation, and for being the first media studies graduate to reach a senior level in the British media.
 He was also the Chief Executive of another major British television station, Channel 4, between 1997 and 2001.

Question: What British television station employed a Welshman who had been an international cannabis smuggler?
Answer: Channel 4