Factual error: Molly and Ramsey find out that the van they are looking for was ticketed in Baltimore City at "the corner of Pennington and Fifth," and they are looking at a computerized map of the area. However, the map can be easily matched up to the actual Mapquest map of the area around the corner of Fifth St. and Patapsco Ave., except that the latter has been relabeled as Pennington. There is a Pennington Ave. in Baltimore City, but it runs parallel to Fifth, about a mile east of it.
Factual error: Haloclines are referred to throughout, and depicted occasionally as some sort of underwater tornadoes. Haloclines are in fact just salinity gradients, and look nothing like they do on the show.
Factual error: Nancy takes her son Silas to an 'underground' doctor used by gang members following an attack by a biker gang. After she tries to negotiate a lower price due to the lack of anesthetics, the doctor says that he can get a second opinion at a hospital and order a $10,000 MRI if she would rather pay for that. However, an X-Ray is the first, less-expensive method used by emergency rooms and trauma centers to confirm a fracture. An MRI is typically only used to evaluate skull/brain-related injuries, but is a rarer utilized, expensive second option to evaluate a fracture that generates an unclear X-ray.
Bums: Making a Mess All Over the City - S3-E14
Factual error: Charlie drops the moltov cocktail into the police car in the end, light enough so that it doesn't break, but the car explodes about ten seconds later, as Charlie explains he had soaked the entire inside with gasoline. However, there realistically wouldn't be such a long pause as shown in the show for the gasoline fumes to ignite. Also, the explosion is much more powerful than it realistically would have been, revealing pyrotechnics were used. Obviously done for comedic value, but still a mistake.
Episode One - S2-E1
Factual error: During this episode, Vincent is remanded to prison for suspected murder. At one scene he is seen working on the wing. Remand prisoners are not expected or allowed to carry out work duties in British Prisons.
Everybody Hates Christmas - S1-E11
Factual error: The episode is dated as 1982. When Chris is sitting on the bench waiting for the bus, the gentleman next to him is singing Tears For Fears' "Shout." The song was not released in the US until June 1985.
Factual error: When Rich and Laura are searching for drug information from the 1960s, they visit the US Patent Office website; under the heading "SSRIs", is displayed "Selecttive Serotonin Reuptake Inhibitors" - with the double-t spelling error. (00:15:25)
Factual error: You hear a recording of Earl's ancestor from the 1860s, but audio recording like that was not technologically possible at the time (especially for someone as obscure as him). (00:10:30)