Following yesterday's first script read-through for the Doctor Who anniversary special, publicity photos were released online by BBC Cardiff.
Matt Smith, David Tennant, and Jenna Louise Coleman joined their latest co-star, the Welsh actress Joanna Page, best known for sitcom, Gavin & Stacey.
Today, the Corporation revealed that 'classic' series monsters, the Zygons will also feature in the forthcoming story. Often cited as Tannant's favourite Who baddie, these shape-shifting aliens' only television appearance was in Terror of the Zygons, way back in 1975.
Filming on the special began today, and the newly re-designed Zygon seen here was pictured on location, outside Neath, South Wales.