This Doctor Who screencap contains
penal institution, penal facility, and holding cell.
There might also be
jail, jailhouse, gaol, clink, slammer, poky, pokey, cell, jail cell, prison cell, green beret, special forces, and elite soldier.
The First Doctor lands in contemporary London; Dodo gets dropped like a moldy potato; two hepcat teens climb on board the TARDIS for Hartnell's last few episodes as the Doctor. If you ever wondered why the Doctor hated computers, wonder no longer.