Doctor Who Series 9 Trailer

Here is it, finally after months of waiting the BBC have released the exciting trailer for series 9, which includes a transmission date. Among other treats, series 9 promises the return of the Brigadier’s old enemies the Zygons (who he encountered in the 1975 adventure, Terror of the Zygons), and, of course, his daughter Kate Lethbridge-Stewart returns with UNIT!