The line "I'm nobody who are you/Are you nobody too?" is from the poem "I'm Nobody! Who are you?" by Emily Dickinson.
Ketamine is frequently described as a veterinary tranquilizer, however it is also used in humans as a sedative for painful and invasive procedures that don't take long. It can also be given in conjunction with opiates like morphine to relieve severe pain as well as muscle spasms.
Jason Wiles, who plays Alexander Gammon, played police officer Maurice "Bosco" Boscorelli in another police procedure drama Third Watch (1999).
Loosly inspired by aspects of "The Girl with the Dragon Tattoo" (2005) novel, by Stieg Larsson. This episode aired in October 2010, and in February 2009, the novel was adapted for film. The film received critical acclaim, and grossed more than $10 million in the US and Canada in a limited release of 202 theaters. The total gross worldwide was $104,617,430.