The shiny shiny JLE
First opened in 1977, year of the Queen's silver jubilee (the original name of the line was to have been the Fleet Line), and extended massively during the 1990s, the Jubilee Line is the only line to connect with all the others, and one of only three not to have any forks or spurs.
Running from Stanmore Station in the North, through Bond Street Station in the West End, Westminster Station, Docklands (at Canary Wharf Station) and terminating at Stratford Station, the line covers an interesting section of the city.
Prior to 1977, the stretch from Baker Street to Stanmore used to be a branch of the Bakerloo line. The new line was planned to relieve congestion at the southern end of the Bakerloo line. It took over the Stanmore–Baker Street branch and extended it southwards through Bond Street and Green Park to Charing Cross. The extension that was completed in the late 1990s, however, was built from Green Park and the Charing Cross spur was then closed off to the public.
For more on the history of the line, see Clive's Underground Line Guides — Jubilee Line.