Dickson was educated at the Belfast Royal Academy in his home city of Belfast, Northern Ireland. He later graduated with a BA Hons degree in psychology from Queens University. While there he was a member of the University Air Squadron, where he flew the Bulldog. He was a reporter and journalist at the BBC, later moving to the presentation department at Radio Ulster. From there he moved on to BBC Radio 2 as a newsreader and announcer, also presenting overnight shows and his own comedy-based Friday show Peter Dickson's Nightcap.
During the 1980s and early 1990s, Dickson worked alongside Steve Wright on his Radio 1 afternoon and morning shows. He created, wrote and voiced many characters for Wright's programmes. In 1990, he launched Melody Radio in London, where he presented the breakfast show for three years. He has contributed to two series of Quote Unquote for BBC Radio 4, and has read the morning story on BBC Radio 4.
Playwright Dennis Potter invited Dickson to play cameo parts in several of his TV dramas. More television beckoned with Harry Enfield in his award-winning Tiger Aspect series Harry Enfield and Chums. Various on screen character roles followed in the first two series of Steve Wright People's Show for BBC One. Bruce Forsyth called Dickson to voice the "Come on Downs" and prize descriptions for seven series of ITV's Bruce's Price is Right and he voiced for Family Fortunes starring Les Dennis, and Patrick Kielty's Channel 4's Last Chance Lottery Live. He provided the commentaries for the world record attempts on Sky 1's Guinness World Records Smashed in 2009. He has also contributed to 11 series of the award-winning BBC One panel game They Think It's All Over presented by Nick Hancock, Catchphrase, TV's Naughtiest Blunders and Safe for ITV and the cult animation series Monkey Dust for BBC in which he played himself.
He was the voice of the BBC's Test the Nation live specials and has featured in Little Britain, The Paul O'Grady Show on ITV and the New Paul O'Grady Show on Channel 4. He provided the live commentary for Cirque de Celebrité and introduced An Audience with Joe Pasquale, and voiced a Westlife special on ITV.
In 2006, Dickson became the brand voice of youth channel E4.
In 2011 and in 2012 he was the host of MTV's three big end-of-year video chart shows.
In 2012 he was the official voice of Olympic Beach Volleyball at the London 2012 Olympic Games.
Documentaries
Since 1998 Dickson has worked closely with the Discovery Channel, narrating over 250 documentaries, including the 25 part The FBI Files. He has completed over 150 other documentary series for BBC Television, National Geographic Channel, Wall to Wall TV, The History Channel, Outline Productions, Adrenaline TV, Café Productions, Discovery Health, and Flat Earth Films. He narrated the 13 part series World War 2: The Complete History, and the 50 part Millennium Minute.
He played various character roles in The Department, a comedy series on BBC Radio 4 starring and written by Chris Addison, John Oliver, and Andy Zaltzman.
Music
In March 2009, Dickson released a UK single as Voiceover Man and The Credit Crunchers called "What a Bunch of Bankers".