[s7e11] - True Genius

Much like the real Zodiac, Caleb sends complex codes to the police. Reid eventually breaks these by realizing they are personal messages to Harvey rather than general threats.

The team initially forgets it is his birthday, adding to his feeling of isolation. [S7E11] True Genius

Caleb Rossmore, a former child prodigy and trash collector. Much like the real Zodiac, Caleb sends complex

The episode references real-world events, such as the Lake Berryessa stabbing and the Paul Stine murder. "Criminal Minds" True Genius (TV Episode 2012) - IMDb Much like the real Zodiac

Reid feels he hasn't achieved enough given his IQ. He compares himself to other geniuses who made world-changing discoveries by his age.