The Bakerloo line is a London Underground line that runs from Harrow & Wealdstone in suburban north-west London to Elephant & Castle in south London, via the West End. Printed in brown on the Tube map, it serves 25 stations, 15 of which are underground, over 23.2 kilometres (14.4 mi). It runs partly on the surface and partly through deep-level tube tunnels.

Elephant & Castle is a London Underground station in the London Borough of Southwark in south London. It is on the Bank branch of the Northern line between Borough and Kennington stations. It is also the southern terminus of the Bakerloo line and the next station towards north is Lambeth North. The station is in both Travelcard Zones 1 and 2. The Northern line station was opened in 1890 by the City and South London Railway (C&SLR) while the Bakerloo line station was opened sixteen years later by the Baker Street and Waterloo Railway (BS&WR). There is an out-of-station interchange with the nearby Elephant & Castle National Rail station.