Castle

The quote on Johanna Beckett's grave reads "vincit omnia veritas" in Latin, which roughly translates to "truth conquers all things".

Detective Inspector Colin Hunt is supposed to be British, yet actor Brett Tucker is Australian, with an accent to match.

Goof: The former CIA analyst was Dr. Nelson Blakely but on the New York State Police Department Accident Report for his car accident reporting his death, the name reads Dr. Michael Blakely.

Goof: Ryan describes the victim as being 28 years old. However, the close-up of the driver's license specifies his date of birth to be March 25, 1978, making him 33 years old at the time the episode aired.

The postal bar code only contains the 9 digit zip code and would not lead them to the exact house, just the mail route.

The Petrazano painting called "The Persecution of Kings" is in reality another version of the "Death of the Virgin" by Caravaggio: the placement of the people is the same, only the color and background change

Before the attempted attack on the school bus, the sniper was seen assembling his weapon, including attaching the scope. However, in order for these attachments to work properly, the gun must be sighted-in by testing the scope alignment and firing test shots to ensure the scope is accurately predicting shot placement. Without being sighted, the scope is usually wildly inaccurate and useless.

Richard Burgi previously appeared on another Nathan Fillion tv show, Firefly.

Although credited, Susan Sullivan (Martha) does not appear in this episode.

When Kate is shown talking on the phone to Ryan and Esposito while in the van her paramedic uniform is buttoned to the top, but when she steps outside of the van the uniform is half open.

Goof: When Kate comes into the bank as a paramedic, she is not wearing gloves. Then when she takes the message from Castle, she is wearing on her right hand a glove, and when she gets out of the bank and gives the patient to the other 2 paramedics, she is wearing gloves on both hands.

About at minute 8:35 into the episode you can see a police officer delivering papers to Det. Esposito. The officer is played by Josh Hopkins.

James Read is the fifth actor from Charmed to guest star on Castle, following Alyssa Milano (season 2's "A Rose for Everafter"), Brian Krause (season 3's "Under the Gun"), Victor Webster (season 3 recurring episodes) and Lochlyn Munro (season 3's "Setup" and Countdown")

Goof: At the end, when Castle is seen handing Beckett a cup of coffee, the cup handle is pointing towards Beckett, but in the next shot he is holding the cup by the handle.

Text on Castle's murder board:

Kate BECKETT: WHO HIRED THE SNIPER?

Johanna BECKETT: Was working on Pulgatti's appeal when she was murdered. Fatally stabbed by Dick Coonan. 3 colleagues also all murdered by Coonan. WHO HIRED COONAN?

Joe PULGATTI: Mob source arrested by Raglan, who pinned Armen's murder on him

Bob ARMEN: Undercover Fed inside Mafia, killed 19 years ago in failed kidnapping attempt.

Hal LOCKWOOD: Hired assassin, killed Raglan + McCallister. Part of continuing mission. WHO HIRED HIM?

3 Renegade Cops, All involved in Armen Homicide

Roy MONTGOMERY: Killed Lockwood and killed by Lockwood. What did he know about who hired Coonan + Lockwood?

Gary McCALLISTER: Shanked in prison by Lockwood (part of escape plan)

John RAGLAN: Killed by hired sniper Lockwood. WHO ORDERED THE HIT? Lead investigator in Beckett homicide, dismissed case as random violence.

Goof: At the funeral, Becket, Esposito and Ryan are in uniform and are wearing the silver shields worn by Police Officers in the NYPD.. Later when back in plain clothes, Esposito and Ryan are displaying the proper gold and blue shields worn by Detectives in the NYPD.

Beckett, Ryan, and Esposito are all wearing patrolman shields during the funeral scene. They should be wearing their gold detective shields.