This marks the fourth time Daleks have crossed the bridge in their pursuit of world domination (and publicity!): as well as the 1964 incursion, the scene was recreated in 1993 for the 30th Anniversary documentary (More Than) Thirty Years in the TARDIS, and then again in 2011 as part of the publicity for the Doctor Who Experience.
This weekend marks the halfway point in filming of the drama, which during the course of last week has focussed on scenes set in BBC Television Centre.
Cast and Crew updates: As well as the actors that portray William Russell, Jacqueline Hill and Carole Ann Ford, other members of the cast are expected to feature in some way. Speaking at The William Hartnell Years convention, Peter Purves mentioned that he would be represented in the drama, and observer Nick Lawton commented on Friday's filming: "'Vicky' [sic] was actually sitting in reception talking with Mark Gatiss, as Bill, Waris etc were filming scene. 'Vicki' was wearing her 'The Rescue' outfit, which is why I think it was her".
A few minor roles that have been cast include child actor Reece Pockney playing Alan, Elaine Andrews playing "1960s Vintage Mum", and Philip C. Francis playing "Restaurant Customer"; model/actor Ernest Gromov also reported his appearance in the drama, which he has now confirmed to us to be a "BBC Designer". On the production side, Matthew Patnick (who worked on Spies of Warsaw alongside David Tennant) is Line Producer, whilst Daniel Bishop (who also worked on The Empty Planet) is Camera Operator.