- Dr. Spencer Reid: [opening quote] "It is impossible to suffer without making someone pay for it, every complaint already contains revenge" - Fredrich Nietzsche
- Dr. Hannah Cooke: [On the victims strangely carved wounds] Honestly, I have never seen this specific type of weapon before
- Matt Simmons: [while showing a picture on his mobile] I have. It's called a Karambit. It's a close-combat weapon. Pretty popular in South-East Asia
- Assistant Mia Prado: Wow! You know, it seriously looks like a tiny Bat'leth
- [everyone frowns]
- Assistant Mia Prado: It's a traditional Klingon weapon
- Dr. Hannah Cooke: Mia, could you just finish with those autopsy photos, please?
- Lieutenant Rakesha Wilson: [Looking at a drawing in blood on the wall] You have any idea what it means?
- Dr. Spencer Reid: It appears to be an attempt to render a serpent entwined staff wielded by the Greek God Asclepius, which historically has been used to symbolize the arts of healing and medicine
- Lieutenant Rakesha Wilson: Medicine? Isn't that supposed to mean the other symbol? The one with the winged staff and the two snakes?
- Dr. Spencer Reid: That's actually Caduceus, the rod of Hermes. Unfortunately the two symbols are often mistaken for each other, because of the US Army medical corps mistakenly adopted the wrong Greek symbol for their branch plague back in 1902
- Emily Prentiss: [On the recording of a 911-call] Were you able to run a digital trace?
- Penelope Garcia: Yes and no: would you believe it came from the Ukrainian city of Sloviansk?
- David Rossi: [Staring at a coded message found in the victim] This looks an awful lot like the cryptograms the Zodiac killer sent
- Dr. Spencer Reid: The Zodiac's four coded messages surely display the same blocking of text symbols and there are 20 lines with 30 symbols on each line, but with the Zodiac used symbols from 7 different sources, this unsub appears to be using letters from 4 pure alphabets: Latin, Greek, Cyrillic and Korean
- Penelope Garcia: Ok, the first thing I can tell you, is that Kyle Reeves did not write that, because he's recent in detainment juvi last week
- Emily Prentiss: So, Spence, how long will it take to crack?
- Penelope Garcia: [raises her hand] Ow, ow! With my help, consider I cracked. I'm crazy for cryptology. If I may it's a homophobic cipher, it's a classic Caesar cypher
- Dr. Spencer Reid: Yeah, when one letter, one code text can be transposed in one letter of coded text. Here one letter, one code can be replaced by a coded letter from each four pure alphabets
- Penelope Garcia: Honey, they can hear how confusing that is
- Dr. Spencer Reid: I didn't tell them that key number we're gonna need to get the actual shift value
- Penelope Garcia: [nods] Yeah
- Emily Prentiss: [Looks complete puzzled to Rossi] Maybe we'll just leave you two to this
- Penelope Garcia: No, no, no, we got thus! It's all in the frequency analysis
- Dr. Spencer Reid: Exactly! Let's start with the most common letter in the English language: E
- Penelope Garcia: Are you flirting with me? 'cause E happens to be my favorite vowel. Ok, if the hypothesis of that is trivial that could mean that our transcendental shift value equals 3... and... if that's true, then our decryption looks like... this!
- Jennifer Jareau: The last time I got an email like that from a person like Barnes, I was taken off the team
- Dr. Spencer Reid: That's not gonna happen again, I honestly don't think that's even possible
- Jennifer Jareau: Well, I do