He has made regular appearances as an antiques expert on the BBC programmes Bargain Hunt, Flog It!, Put Your Money Where Your Mouth Is and Antiques Road Trip.
Antiques Roadshow | Abbey Road Studios | Silk Road | road | Road Rules | Abbey Road | Road to Perdition | New Circle Road | road racing | Jinshajiang Road Station | Waterloo Road | road running | On the Road | National Road | Lansdowne Road | Grand Trunk Road | Jinyun Road Station | Great North Road | Toll road | Road to Avonlea | Long Island Rail Road | Waterloo Road (TV series) | The Jungle (Wheldon Road) | Road bicycle racing | Portobello Road | toll road | The Trip to Bountiful | Road to Zanzibar | Road Town | road bicycle racing |
On 19 November 2013, Mark took part in a celebrity edition of Antiques Road Trip alongside his mother Judith Chalmers.
STV Productions have produced many shows, including: Scottish Passport, The Hour, Catchphrase, The Poison Tree, Fake Reaction, Antiques Road Trip and many more.