 This episode had a five day shoot. The second day of the shoot was  11 September 2001. The cast and crew arrived to the location set  listening to live radio reports of the terrorist attacks as they  were happening. Even during the filming, the crew had monitors  showing live TV reports. By noon, the director gave the cast and  crew the option to cancel the shoot. Unanimously, everyone decided  to continue filming. Many of the cast used anger and sadness (built  up from watching the 9