Full text of the threatening letter Sam Carver sent to Belle King, complete with the typos: dear Belle Or should I call you jezebelle for the way you have betrayed us. Janet is so upset about Michael shes holed up in bed and can barely get up. shes crying non-stop. You made promises and gave us hope but then you couldn't deliver. I dont want to see the same thing hapen with Hank. That's why I writing to tell you to stay the hell away from us. Every time you leave a message its like a bulet through our hearts. You may not keep your promises but I do and I promise that if you dont let this thing with hank or there will be a bulet for you. If you ever try to contact us again i'll kill you and thats a promise.
Goof: 131 (or any radioactive material) at the end of its half life does not instantly become non-radioactive, as was depicted in this episode. Radioactive decay is a continuous process. The half-life has no beginning, but tells you how much time after now for however much is there at any time now to be reduced to one half that amount. Wait enough half-lives and the amount will fall to an inconsequential amount, but one is never enough.
Speed: What's up? Delko: The guy said my exposure was equal to what a pilot gets on a flight to Paris. Calleigh: Next time, take the trip to Paris. It'll be easier on all of us.
Eric: I heard radioactivity can cause temporary infertility. Speed: So, you and your girlfriend are temporarily in luck… Eric: Yeah or permanently screwed!
Belle King: Did you know Horatio was the first CSI? Horatio: He was ... the what? Belle King: In Hamlet. When Hamlet was poisoned and dying, he asked his best friend Horatio to tell the world who murdered him.
International Episode Titles: Germany: Radioaktiv (Radioactive) Czech Republic: Živá mrtvola (The Living Dead)
International air date: Greece Tuesday 29th April 2008 at 22.00 on ET1
The title of this episode is an allusion to the 1995 movie Dead Man Walking starring Susan Sarandon and Sean Penn.
This is a similar plot to the 80's film D.O.A. (itself a remake of the story) starring Dennis Quaid and Meg Ryan, where he finds he has ingested radioactivity and only has a certain time left in which to find his own killer.
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