The newspaper clipping has Van Der Hoff's date of death at 26 April and his age at 55. The card attached to his arm at the mortuary shows his date of death at 11 April and his age at 47.
While sitting on the park bench, Watson removes the to-go box from the bag twice.
With Watson asleep at a desk in the brownstone, Holmes wakes her, upon which she asks "What time is it?", whereupon Holmes replies, "The middle of the work day in England." This would be around 13:00 in the UK, and around 09:00 in New York, however, it is clearly night in the brownstone.
As Gottlieb is confessing to the murders at the police station, he admits to creating an "antibiotic-resistant strain of Rubella". Rubella is a virus, and as such it would not be susceptible to antibiotics in any case.
In John Douglas' British 'Reform School' records, Borstal and Lambeth are spelled as Borstel and Lambath. The American spellings 'neighbor' and 'harbored' are used instead of 'neighbour' and 'harboured' . Moreover, Borstal Schools are not called reform schools in the UK.
As Watson and Holmes drive away from The Parthenon following their suspect, the driver in their car is a man, not Watson.
When Holmes and Watson break into the funeral home to examine Phillip Van Der Hoff's body, the tag listing the details of the deceased person contains the label "ATTACH TO TOE". The tag is clearly tied around his wrist.