On 18 Feb, 22:23, (Dave) wrote:
Last nights episode featured giant spiders etc. on the Underground.
There was one shot of Arsenal station and presumably Aldwych was used
for shots with the train and tunnel entrance. But there were several
scenes of tunnels with curved walls of brickwork but not tiled. Were
these some of the long disused tunnels at Aldwych that I don't think
were never used.

Dave

The outside shot of Arsenal with the roundel in poor condition was
horrid!

The 'bunker' scenes appear to have been shot in the 'hostel' off the
Aldwych spur at Holborn, although Charing Cross jubilee was used for
the station evacuation scene where people were leaving via the
escalator.