The timer display on the bomb varies randomly from one shot to another.
When it is in the air, the helicopter is seen to be battered by the rain, but it is perfectly dry on the ground.
Blonde junkie has frizzy hair when first seen, but has straight hair later on.
The bomb-disposal Major wears the badge of a Royal Engineer soldier, depicting laurel leaves. The design should be one of a flaming grenade.
The soldiers are armed with .303 rifle, No. 4 Mk 1 Lee Enfield, whereas at the time the 7.62mm L1A1 rifle, commonly known as the SLR, was the standard rifle of the British Army from 1957 until 1985, a redesigned version of the Belgian FAL.
Bodie looks at the clock and it says 9 pm. He and Doyle then bowl, the scientist faints and is taken to hospital and questioned, and the two men return to the bowling alley. The clock says 940 pm, but all this action could not have occurred in just 40 minutes.
Bob stabs Fraser but does not ensure he is dead. His plan is jeopardised by witnesses and his character would have disposed of the body. A body means police presence near his bowling alley.
When the scientist faints, Bob has no involvement in the care of someone who is integral to his plan. His character would have taken charge and ensured no-one questioned the scientist.
When Blackie's house is raided, Cowley says 'if he goes near a button, kill him'. When the soldiers enter the room, they ignore Blackie, lower their guns and begin to search boxes. Their characters would keep Blackie covered until it was certain he was not a threat.
Cowley instantly recognises Kerrigan from a photo. Kerrigan has been at the bowling alley all night and neither Bodie nor Doyle recognise the Special Branch agent. Ex-cop Doyle knows everyone from other police services.