- Could Dean ever really kill Sam if he had to?
- Dean finally tells Sam the last thing John said before he died.
- Two more "special children" are revealed -- Scott (but he does not last long) and Ava (who disappears).
- When Dean and Sam are running from Gordon as he's shooting at them, they jump into a ditch to duck down, an Jensen falls into it by mistake. The editors liked it and kept it in the scene.
- Jefferson Airplane - "White Rabbit"
- Carey Bell - "Lonesome Stranger"
- Muse - "Supermassive Blackhole"
- Bosshouse Music - "Swamp Thing"
- Sam mentions that he watches a lot of T.J. Hooker, Referencing the 1982-86 TV series starring William Shatner as Thomas Jefferson Hooker, a tough cop training raw recruits.
Remember your imaginary childhood friend? Bet your buddy wasn't anything like an angelic little girl's invisible playmate: a hoodoo demon with an unearthly aptitude for murder.
