Alcatraz was a military prison beginning with holding Confederate prisoners of war in 1861. By 1866, it was determined that its use as a defensive fort was obsolete and it became a full-time prison. It was transferred to the Department of Justice in 1933 and became a federal prison in 1934. It was at this point that it reached the height of its fame and notoriety.
This show was rescheduled from December 27th 1968. This was due to a news special about 1968 preempting it at the last minute.
The tube marked Conference Room in the rocket launching room was previous seen in The Night of the Big Blackmail in the architect's office.