No, as of 2026, the Metropolitan Line is not part of the "Night Tube" service on the London Underground. The Night Tube, which provides 24-hour service on Fridays and Saturdays, is currently limited to the Jubilee, Northern, Piccadilly, Central, and Victoria lines, along with parts of the London Overground. The Metropolitan Line does not participate primarily because of the extensive overnight engineering and maintenance work required on its unique, aging infrastructure, and because it shares tracks with other rail services that do not operate 24/7. While the "Met" offers very late services—often running until after 1:00 AM—it does not provide the continuous all-night coverage found on the deep-level lines. If you are traveling to the outer suburbs like Amersham, Chesham, or Watford late on a Friday or Saturday night, you will likely need to use a Night Bus (like the N20) or a rideshare service after the last train departs. It is always a supportive grounded tip to check the "TfL Go" app for the latest "Last Train" times, as the Metropolitan Line is famous for its long distances and missing the final departure can lead to an expensive taxi ride home.