The Foxes and Hounds Affair - S2-E4
Corrected entry: Professor Stemmler tells Solo that the hypodermic he's just been injected with contained water rather than the Minus-X drug. He'd have been better off with the drug, or at least a nice, blood-friendly saline solution. An injection of plain water can cause haemolysis (cell membrane rupture), which could be lethal. Absolutely not an urban myth. Professor Stemmler should know better.
Correction: There's nothing in the scene to infer Stemmler was talking about "plain" water. Given Solo's lack of medical expertise, it would be easier to say "water" than "saline solution" (which is still water).
Bishop73