At one point, Colin Barnes, played by Eric Close, rages that if the SVU team isn't capable of finding his missing daughter, perhaps they should turn the case over to the FBI. In Without a Trace (2002), Close played an FBI agent who was a member of the missing persons unit.
Ashley Riggs mentions that her biological father is a renown surgeon named Dr. Baker who specializes in "ex-vivo lung transplants", the term "ex-vivo" is Latin for "out of the living". In the field of science and medicine the term is used to refer to experiments, measurements, procedures or treatments done on tissue that has been removed from a living organism; in-vivo is the term used for tissue that is still inside the organism. By definition all lung transplants are done ex-vivo, because the lungs have to be removed from the body to be transplanted, no one that is an actual medical professional would call it "ex-vivo lung transplantation", because it is redundant and there is no such thing as "in-vivo lung transplantation".
Though the characters played by Close and Van Der Beek went to medical school together, Close and Van Der Beek are 10 years apart in age.
The song heard throughout the episode is "My One and Only Love." It was written in 1952 by Guy Wood (music) and Robert Mellin (lyrics) and then subsequently published in 1953. The album this version appears on is "John Coltrane and Johnny Hartman" and was released in 1963 on the Impluse! record label. The personnel includes John Coltrane (tenor saxophone), Johnny Hartman (vocals), McCoy Tyner (piano), Jimmy Garrison (bass) and Elvin Jones (drums).