Continuity: They pull a man out of the swamp who they believe is still alive, but not breathing, and they sit there pounding on his chest. Not only did they not check for a pulse to determine that chest compressions were necessary, but no one was giving mouth to mouth or doing rescue breathing.

Continuity: At the very beginning of the episode, when a man catches a fish from his boat, another man places his hand on his shoulder to congratulate him,in the next shot his hand is gone.

Other: In the flashbacks of the crime, the surviving toddler continually walks through the blood, making perfect little 'blood footprints' all over the house, and a trail leading into the back yard. Accompanying him walking around is a sound effect implying that the feet in the toddler's footed pj's are made of cloth...acting like a sponge...unfortunately, not only would the footprints not be perfect and long lasting, but the pj feet were plastic.

Revealing: While Horatio and Alexx are examining the prostitute's body, you can see the corpse breath in a side view

Revealing: The compound Heptan-2-one is mentioned several times in this episode. The actress concerned persists in pronouncing the last syllable 'one' as in the number 1, whereas its correct scientific pronounciation should be as in the word 'bone' ie. sounds like 'own'. Nitpicking certainly, but a dead giveaway to any viewer with a basic knowledge of chemistry.

Factual error: Using a Draeger tube to test for nitric acid fume, the instrument made a clicking sound. This device does not click. The bellows pump is squeezed drawing air through the tube. A reaction takes place between the air contaminant and the material in the tube causing a color change. The length of stain is proportional to the concentration.

Revealing: Horatio writes the symbols for sulfuric acid, H2SO4, on a clear board. Both numbers should be subscripts but he writes the 4 as a large number, suggesting a lack of basic chemistry knowledge

Factual error: Nitric acid is a liquid and not a gas. The gaseous precurser is NO2 which combines with water forming nitric acid, HNO3. Neither causes instant death.

Deliberate "mistake": In the episode "Bunk," a man goes in the house looking for his cat. When the cat releases the fumes, it jumps down, but when the man dies, the cat is nowhere to be found. The cat is not mentioned ever again in the episode either.

Continuity: The scissors are being profiled but as seen with last scissor coming in, it's discarded after only one cut of the tape. This is NOT conclusive, as the whole blade of the scissor has to be profiled, which means he has to cut the tape at least a few times, until he has covered the whole blade, section by section

Factual error: Iodine-131 does not decay to normal Iodine. It decays to a stable isotope of the noble gas Xenon.

Factual error: I-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

Other: In the final scene, Belle says "Thank you" to Horatio, but the DVD subtitles say "I like you". (Region 2 UK DVD).

Factual error: Firstly, I-131 has an eight day half life. It is thus impossible that she is poisoned on day 1 (a dose enough to kill her), and then the following day there is no detectable rad. reading at the source. The eight day half-life also comes into play with the hand that becomes "neutralized" to radioactivity. Secondly, the discussion re: alpha, beta, and gamma radiation is true, however if breathed/ingested, I'd sure rather it be a gamma emitter than an alpha emitter, as alphas will deposit more energy (this is contrary to what was stated).