Ivo Graham, Luke McQueen, Rachel Parris

Sara Pascoe is joined by Ivo Graham, Luke McQueen and Rachel Parris who compete to deliver the best lecture.

Ivo's lecture is ‘What Do Babies Think?', Luke's is ‘Is Time Travel, Especially Into the Past Possible?' and Rachel's is ‘Really Achieving Your Childhood Dreams'.

All three lectures are judged by an expert and then the audience help decide the winner by voting for their favourite lecture.