Sandra reminds Stan about her E.S.T. graduation. This is the Erhard Seminars Training, an organization founded by Werner H. Erhard, which offered a two-weekend (60-hour) course known officially as "The EST Standard Training" that started in the early 70s and ended in the mid-80s. Werner sold all of his technology to Landmark Education which now provides a similar (but modern) version of the experience all over the world called The Forum.
The book the two FBI agents are discussing is 'Spycatcher' by Peter Wright and Paul Greengrass. The book alleged that former MI5 Director General Roger Hollis was a Soviet agent. The British Government spent two years trying to ban the book under the provisions of the Official Secrets Act. In his book, The Defence of the Realm: The Authorised History of MI5, Cambridge historian Christopher Andrew rejects this theory. The government's official position, first stated by PM Margaret Thatcher, is that there was no evidence that Hollis might have been a traitor.
Stealth technology, also termed low observable technology (LO technology), is a sub-discipline of military tactics and passive and active electronic countermeasures, which covers a range of methods used to make personnel, aircraft, ships, submarines, missiles, satellites, and ground vehicles less visible (ideally invisible) to radar, infrared, sonar and other detection methods. It corresponds to military camouflage for these parts of the electromagnetic spectrum.
Henry has many Star Wars items in his bedroom including a C-3PO figure, bedspread and a poster included in the 1977 Star Wars soundtrack double album. He also has a pictures of Buzz Aldrin saluting the US flag on the moon and Aldrin's bootprint.
Features on TV, at the beginning of the episode, Jhoon Rhee's "Nobody Bothers Me" commercial.