2017
- The Science of Star Wars, Winchester Science Centre, 7 Oct
- The Science of Star Wars, Winchester Science Centre, 8 Oct
- The Science of Superheroes, National Waterfront Museum, Swansea, May
2016
- The Science of Star Wars, Hay Festival 2016, 27 May
- The Science of Star Wars, Edinburgh Science Festival, 2 April
- How To Be A Space Explorer, Edinburgh Science Festival, 2 April
- The Science of Star Wars, Edinburgh Science Festival, 1 April
- The Science of Superheroes, Edinburgh Science Festival, 1 April
- The Science of Doctor Who, NI Science Festival, Belfast, 28 Feb
- The Science of Star Wars, NI Science Festival, Belfast, 28 Feb
- The Science of Star Wars, Armagh Planetarium, 27 Feb
- The Science of Harry Potter, Wayword 2016, 18 Feb
- The Science of Star Wars, Wayword 2016, 18 Feb
2015
- How To Be A Space Explorer, Greenman Festival, 23 August
- The Science of Star Wars, Greenman Festival, 22 August
- The Science of Star Wars, Edinburgh Science Festival, 13 Apr
- The Science of Star Wars, Edinburgh Science Festival, 12 Apr
- How To Be A Space Explorer, Edinburgh Science Festival, 12 Apr
- How To Be A Space Explorer, Cardiff Childrens Literature Festival, 29 Mar
- Space, Time, Machine, Monster: Doctor Who, TEDxCardiff, 28 Mar
- How To Be A Space Explorer, Big Bang Fair, Birmingham NEC, 11-14 Mar
2014
- The Science of Harry Potter, National Waterfront Museum, Swansea, 31 Oct
- The Science of Doctor Who, Powys Writers Squad, Newtown, 18 Oct
- The Science of Star Wars, Seven Stories, Newcastle, 11 Oct
- The Science of Doctor Who, Powys Writers Squad, Brecon, 4 Oct
- The Science of Doctor Who, British Science Festival, 11 September
- The Science of Doctor Who, Basingstoke, 18 August
- The Science of Doctor Who, Gosport, 18 August
- The Science of Doctor Who, Candy Jar Book Festival, Cardiff, 9 August
- The Science of Star Wars, Wrexham Science Festival, 17 July
- The Science of Star Wars, Westminster Kingsway College, London, 2 July
- The Science of Star Wars, Stoke Newington LitFest, London, 7 June
- Star Wars interview with BBC Radio Wales’ Wynn Evans Show, Hay, 30 May
- The Science of Star Wars, Hay Festival, 30 May
- The Science of Doctor Who, Hay Festival Schools Programme, 23 May
- The Science of Doctor Who, Big Bang Fair, Birmingham, 13-16 March
- Space Hoppers, Swansea Waterfront Museum, 17 January
2013
- The Science of Doctor Who, Swansea Waterfront Museum, 14 December
- Dr Who, Space, Time, Machine, Monster Festival, Newport, 19 Oct
- Mark interviews Jasper Fforde and Adam Roberts, SF Festival, Newport, 19 Oct
- Stoke Newington Literature Festival, 8 June
- The Science of Dr Who, Edinburgh Science Festival, 6 April
- They Came from Outer Space, Edinburgh Science Festival, 4 April
- Cardiff Children’s Literature Festival, 23 March
- Enfield Schools, 14-15 March
- Barry Library, 9 March
- Penarth Library, 2 March
- National Maritime Museum, Falmouth, 16-17 February
- Doctor Who Experience, 12 February
2012
- Big Bang Near Me, 20 November
- GobbleDeeBook Festival, 25 October
- Just So Festival, 19 August
- Green Man festival, 17 & 18 August
- Wrexham Science Festival, 19 July
- Dinefwr Literature Festival, 29 June
- Cheltenham Science Festival, 16 June
- Hay Festival of Literature and Arts, 5 June
- Smack The Jellyfish!, 24/5 May
- Lacock Church, Wiltshire, 22 May
- Cowbridge Literature Festival, 30 April
- Hay Festivals Scribblers Tour, University of Wales, Trinity St Davids, 23 March
- Creative Writing Workshop, University of Wales, Lampeter, 22 March
- Hay Festivals Scribblers Tour, University of Wales, Trinity St Davids, 22 March
- Cambridge Science Festival, 18 March
- Enfield Science Week, 15-16 March
- Hay Festivals Scribblers Tour, Aberystwyth University, 23-24 February
- National Maritime Museum, Cornwall, 11-12 February
- BBC Stargazing Live Showcase Event, Lacock, 18 January
2011
- Cheltenham Science Festival Somerset Schools Christmas Lecture, 7 December
- Winchester College, 21 November
- Cheltenham Literary Festival, 1, 2, 14 October
- Aberdeen Science Festival, 23 September
- Bradford Science Festival, 13 September
- Edinburgh Book Festival, 24-26 August
- Green Man Festival, 21 August
- Just So Festival, 19 August
- Really Really Big Questions About Space and Time, Rheged
- Hay Festival, 26 May – Really Big Questions About Space and Time
- Cowbridge Festival, 22 May – Really Big Questions About Space and Time
- Valleys Discovery Festival, 16 – 21 May – In These Bones, Horizons Sing
- Edinburgh Science Festival, 12 and 13 April – The Science of Dr Who
- Oxford Literary Festival, 10 April – Science Fiction to Science Fact
- Cambridge Science Festival, 19 and 20 March – The Science of Dr Who