The Doctor and Martha Jones spend most of the episode “Gridlock” in cars that are stuck on the motorway of New New York, where the traffic jam is endless and drivers spend decades literally going nowhere. Eventually, the Doctor learns that a virus wiped out the upper city and the motorway and undercity were sealed off to save the people there from the same fate. He also discovers that the apparent savior of the undercity is none other than The Face of Boe, who has wired himself into the power system in order to keep the undercity’s automated systems going.
Although the people of the undercity were saved from the virus, their existance is not what you would call a good life. The Face of Boe, knowing that his death is at hand, asks the Doctor to help save the people once again by freeing them from the motorway. The only problem is that to unseal them would require much more power than what is available. Finally, in one last monumental effort, the Face of Boe pours out every ounce of energy he has left in order to open the gates and allow the cars into the sunny upper city at last. “My lord gave his life for the city,” remarks Novice Hame, the Face of Boe’s caretaker.
Lent is a time to reflect on sacrifices. Some people give up something for the forty-day period because it helps them remember Jesus’s ultimate sacrifice, which opened the doors that trapped us in our pointless, smog-filled existence away from God and let us out into the light. It also gives us cause to proclaim, “My Lord gave his life for the world.”