Dalek time machine (Empire of the Daleks)

Acting on the orders of the Emperor on Skaro, a Dalek time machine, crewed by an Elite Guard Dalek and three subordinate silver Daleks, oversaw the conditioning of Caligula, Emperor of Rome, in the year 37 AD. When Caligula resisted Dalek commands, the leading Dalek deemed the mission a failure and chose to abandon it before returning to Skaro, noting that there were other nexus points in human history. (COMIC: Empire of the Daleks)