This year we got to see Margot Robbie play Harley Quinn again in the new prequel to Suicide Squad by James Gunn! So let’s review these Harley Quinn Halloween costumes. This years guests include Chris Rankin; who played Percy Weasley in Harry Potter, Ross O’Hennessy; who played The Lord of Bones in Game of Thrones and Jeff Cummins; illustrator of Doctor Who target books.