Making an appearance alongside Mark will be rapper and TV presenter Jon Chase, who will be providing his own fun-filled perspective on Who's science.
The event will take place 9th August at Cardiff Central Library at both 12pm and 2pm. Bringing the perfect blend of charisma, humour and education into the mix, people of all ages can enjoy the dynamic duo's unique method of entertaining kids with a little bit of a twist.
Over the years Mark has already written a number of books closely related to the event's topic, including Space Hoppers, Really, Really Big Questions about Space and Time and The Alien Hunter's Handbook. His latest book, Space, Time, Machine, Monster has just been released by Candy Jar Books and serves as an irreverent look at how science fiction and the good Doctor have impacted and changed our lives.
If you'd like to know more about the festival, click here.