Callen features in the exhibition film Colour and Light: The Legacy of Impressionism, Ateneum Art Museum Finnish National Gallery, Helsinki, October 2023 to January 2024

Callen appears in Series 11/3 of BBC1's 'Fake or Fortune?' discussing drawings thought to be by CEZANNE and PISSARRO, Autumn 2023

Callen appears in Series 10/3 of 'Fake or Fortune?' discussing a possible Alfred SISLEY landscape painting 2022

Callen features in the November 2018 documentary Exhibition on Screen: Degas: Passion for Perfection
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Callen features in Series 7/2 of 'Fake or Fortune?' discussing TOULOUSE-LAUTREC's early sketchbooks, September 2018

Talking on MONET's plein air painting techniques, Callen features in the film Monet and Architecture shown at the exhibition, National Gallery, London, Summer 2018

Callen featured in The Listening Service BBC Radio 3 broadcast on 'Debussy the Impressionist?', 18 February 2018

Callen appears in two episodes of BBC1's 'Fake or Fortune?': Series 6/2 and 6/3 in Autumn 2017 on 'Tom ROBERTS' and 'Paul GAUGUIN'

Callen appears in BBC1's 'Fake or Fortune?' Series 4/2 - on Renoir, July 2015

Callen appears in Series 2/1 BBC1's 'Fake or Fortune?' on DEGAS's Dancer oil study first televised in September 2012
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Callen contributed research to BBC1's Series 1 of 'Fake or Fortune?' on Claude MONET 2011