Sherlock Holmes in the 22nd Century (1999)

S1E15 The Five Orange Pips

A man finds five orange seeds enclosed in a letter, but they are contaminated with a serum that causes him to fall into a coma. Before losing consciousness, he scribbles down an address and instructs his son to seek help from Sherlock Holmes, strictly warning him not to take him to a hospital. The situation is further complicated by the family's staunch anti-technology beliefs; they reject modern advancements and prefer life in Sherlock's era, making Watson's presence anything but welcome.