Emily Prentiss: "Holding onto anger is like drinking poison and expecting the other person to die." – Anonymous
Penelope Garcia: "Forgiveness is the fragrance that the violet sheds on the heel that has crushed it." – Mark Twain
Despite being credited in the opening sequence, Matthew Gray Gubler, who portrays Reid, doesn't appear in the episode.
This is, in fact, the eleventh episode in which a main character has not appeared despite his or her actor or actress being credited as usual. The first episode was Broken Mirror, in which A.J. Cook and Kirsten Vangsness do not appear as JJ and Garcia, respectively, despite being credited. The second was 25 to Life, in which Thomas Gibson does not appear as Hotch. Three Season Eleven episodes were part of a small story-arc, in which Gubler also did not appear as Reid. The sixth and seventh were Taboo and The Anti-Terrorism Squad, both in which Tyler did not appear as Lewis. The eighth and ninth were Profiling 202 and Seek and Destroy, in which Gubler did not appear as Reid either. In the latter episode as well as the seventh episode Dust and Bones, Tyler also did not appear as Lewis. In Neon Terror, Matthew Gray Gubler and Aisha Tyler do not appear in that episode as Reid and Lewis respectfully. In False Flag, Matthew Gray Gubler does not appear in that episode as Reid. In Submerged, Matthew Gray Gubler does not appear in that episode as Reid.