When his father asks Shawn how a 30 year old could pass as a teenager, Shawn tells him that with a wig, Henry would look like he did when Shawn was a little kid, referring to the flashbacks where Henry uses a wig to look younger. He says this while they are sitting in the same place doing roughly the same thing as the flashback from the beginning of this episode.
Many of the main characters are named after famous scientists. William Bradford Shockley (1910 - 1989) was an American physicist and inventor who won the Nobel prize in 1953. Dr. Robert H. Goddard (1882 - 1945) was a pioneer in the field of rocket science. Otto Hahn (1879 - 1968) is a German chemist who is credited with the discovery of nuclear fission. The Meitner School itself is named for Hahn's colleague, Swedish chemist Lise Meitner (1878 - 1968). Kurt Gödel did groundbreaking math work for set theory, logic, and computers.
The chemistry equation that Kirk writes on the board to test Shawn's psychic powers is Avogadro's number.
At the beginning of the episode , Shawn and Gus are meeting with a client, Daphne. Daphne is played by Crystal Lowe, who also played the character Eden in season one, Scary Sherri: Biancas Toast (season one)
Gus says he tap danced as part of his school application. When he was younger, Dulé was in the musical The Tap Dance Kid.