Frank Skinner and Joan Bakewell begin their hunt for the Portrait Artist of the Year. Heat one sees artists paint sitters Sol Campbell, John Humphrys and Maisie Williams against the clock.

More artists put their nerves and artistic flair to the test as they paint celebrities Julian Fellowes, Ronni Ancona and Helena Kennedy QC in Edinburgh. With Frank Skinner and Joan Bakewell.

Artists in Scotland paint Gary Kemp, Daniela Nardini and Ashley Jensen. An incredibly close heat means there's a twist in store. With Frank Skinner and Joan Bakewell.

Frank Skinner, Joan Bakewell and the judges move the competition to Wales, where 12 gifted artists get just four hours to paint celebrities Non Evans Ade Adepitan and Greg Davies.

Artists vie for the final place in the semi-final by painting Sharon Corr, The Divine Comedy's Neil Hannon and actor Colm Meaney in Dublin. With Frank Skinner and Joan Bakewell.

The seven semi-finalists battle for a place in the final by painting a double portrait of Richard Dawkins and Sally Hitchiner. With Joan Bakewell and Frank Skinner.

It's crunch time as the three finalists get four nerve-wracking hours to paint The Hobbit actor Sir Ian McKellen. Who will the judges crown the competition winner?

Join the 2014 winner as they plan, paint and unveil their £10,000 commission to paint actor Alan Cumming for the Scottish National Portrait Gallery.