At the airport for the prisoner exchange Cowley gets out of the car and Doyle can be seen behind him wearing sunglasses but on Doyles Close up the glasses are on his head, back on Cowley and Doyles glasses are on his face again.
While Doyle is driving and talking on the radio, there is traffic seen behind his car through the rear window. He does a sudden U-turn and the exterior shot shows no traffic.
When Christina arrives at the library, she places her bag and coat on a coat-stand which is in an alcove. When she leaves the library later that morning, she retrieves her coat and bag from the coat-stand which is now standing against a wall.
Cowley is beginning a second round of interrogation with the suspect Kristina Herzog and states that it resumes at "19am". This time does not exist. It should be 1900 hours or 7pm. It's also obviously morning. What probably has happened is that there is a sound glitch, owing to the age of the recording, leading to a missed number. It's probably "9:19am" or "10:19am", but it's difficult to tell from Cowley's lip movements.