As Dr. Pearlman is about to give Val the injection to counter the R6 she was given, she says "This shot ... raises the pH levels in the body. The acidity neutralizes the tracking function ...". Raising pH in fact corresponds to a shift to the alkaline, the opposite of acidity.
The establishing shot of the Nyack Station is actually San Diego's Union Station with "Nyack Station superimposed" over the Santa Fe sign.
Henry Thompson is talking to Ryan, Val and Dr. Pearlman, who have just arrived. He says that they have a cabin in the "Andirondacks". He was supposed to say "Adirondacks".