Most of the footage with Agent Todd used the original dialog. With the exception being the scene where Kate is talking to Rachel. The actual footage is from Dead Man Talking (2004), when Kate is talking to "Duane".
Scott Lawrence plays Navy Captain Thomas Lind in this episode. However in JAG (1995), the show in which NCIS (2003) was the spin-off, had Scott as a regular for 4 years as Cmdr. Sturgis Turner.
This episode was inspired by the M*A*S*H (1972) episode Dear Sigmund (1976), This is the first episode of NCIS (2003) to be inspired by M*A*S*H, of which show runner Gary Glasberg is a fan.
As the Dr. and McGee enter the houses to search it, the Dr. makes a comment about there being "no clowns on the walls" and that being a good sign. This is referencing John Wayne Gacy, a serial killer who dressed as Pogo the Clown and was known as the Killer Clown.
Kim Johnston Ulrich, Nancy Hargrove, played Lila Simon in the series Reasonable Doubts (1991) alongside Mark Harmon, Gibbs.