The 9/11 attacks, also known as the September 11 attacks, were a series of four coordinated terrorist attacks carried out in the United States on September 11, 2001. The attacks targeted the World Trade Center in New York City and the Pentagon in Arlington, Virginia, resulting in the deaths of nearly 3,000 people and triggering major US initiatives in the global War on Terrorism.

The podcast episodes provided cover a range of topics related to the 9/11 attacks, including the impact on Wikipedia's growth and development The Big Episode on Wikipedia, a detailed portrayal of the lead-up to the attacks from the perspective of an al-Qaeda spy The Spy Who Betrayed Bin Laden, skepticism about the official narrative surrounding the attacks Squirrelly, the story of a 9/11 survivor who became the face of a support network Case 286: The Survivors' Network, and the criminal case against the alleged plotters This Is the Weirdness.