This is the first episode in which Carlos Valdes (Cisco Ramon) does not appear, as of this episode only Grant Gustin, Candice Patton and Danielle Panabaker appear in every episode.
Spencer's powers and abilities are similar to the mainstream villain Spin. Known only as Mr. Auerbach, Spin could control people by using televised reports.
This is the first episode to introduce meta-tech.
At 14:28 Spencer Young says "Now we are both Charleine Foster Kanes" who is a character in "Citizen Kane".
At 4:39 Sherloque texts to Nora "BRING GOURSELF & PARENTHESES TO STAR LABOUR POST HASTE". He probably intended to text "BRING YOURSELF & PARENTS TO STAR LAB ASAP".