The Countess - S1-E4
Factual error: Two cops (the bowtie guy that cuffs Rockford and the one that watches him being taken away from his trailer) report to HQ saying that the protagonist is a suspect for a 157, to which Rockford reacts saying he did not murder anyone (and it is in fact what he is accused of). But homicide is in CA police code 187, not 157. A 157 is an entirely different felony. (00:21:00)
Tall Woman in Red Wagon - S1-E6
Factual error: At the end of the episode, Rockford regains consciousness while the doctor tells the nurse; "500 cc of adrenaline, stat." Five hundred cc means half a litre. It would kill a whale. (00:43:45)
Tall Woman in Red Wagon - S1-E6
Factual error: This episode takes place in Elmira, California. Sandra tells Rockford that it is about 150 miles south. Rockford is in Los Angeles (it is later confirmed that so is Sandra, Longview to be precise) and Elmira is in Solano County, about 400 miles north.
