The Crusade and the Space Museum
The Doctor and his companions take a holiday at a villa just outside Rome in 64 AD. While he and Vicki visit Rome, Ian and Barbara are captured and taken as slaves, Ian is sold as a galley slave, and Barbara to Nero’s court. The Doctor is mistaken as an enemy of Nero’s and is taken to the Emperors palace.
The Space Museum
The TARDIS arrives near a vast Space Museum on the planet Xeros, but has jumped a time-track. The First Doctor, Ian Chesterton, Barbara Wright and Vicki have a series of bizarre experiences as they venture outside and into the Museum – not least that they see but cannot be seen by the militaristic Moroks who run the museum, or the servile indigenous Xerons who work for them. The museum contains fascinating exhibits, including a Dalek shell, but the most worrying is the four travellers themselves encased and on display. Quite soon afterward the time track slips back and, though the exhibits of the TARDIS and the four travellers vanish, they still find themselves inside the Museum.
The Crusade was the sixth episode of season 2 and The Space Museum was the seventh episode of season 2