There's a bomb in the basement of the church.
Cyrus Beane gets a phone call warning him about the imminent explosion and the need to evacuate the building, and the wheels start to turn in his head. The president is in the Oval Office, but his opponent in the upcoming election-- Sally Langston-- is in that very church along with a few hundred other people. If Cyrus does nothing, she'll die and President Fitz will stroll into his second term unchallenged.
Even without logistical support from the MBTA, and in face of active discouragement from public safety and marathon officials, the Midnight Marathon Bike Ride is still on for this Sunday. For the fifth year, hundreds of bicyclists will trace the Boston Marathon route in the wee hours before the race begins.