Level 4
From Tardis Wiki, the free Doctor Who reference
Level 4 was a level of the Dalek City. Disguised as a Dalek, Ian Chesterton took the First Doctor, Barbara Wright and Susan Foreman to the fourth level. (TV: The Daleks)
During the 25th century Dalek invasion, the Dalek Council had their chambers on Level 4 of the city. (COMIC: Invasion of the Daleks, The Oil Well, City of the Daleks)
