The phone number that Mike gets off the paper found in the agents pen is not the same phone number that Will repeats to Mike when his reading off the same paper when Mike is dialing the phone number.
Whilst burying the agent in the junkyard, the depth of the hole varies from a few inches above the dead body to a few feet and back again.
The opera about Nina was apparently written in 1786. No wonder Nina's lover did not return to the train station where she awaited him - trains had not yet been invented .
Yuri claims Jif peanut butter was banned in the USSR. Although it may have been difficult to get, there was never a ban on the product.
When breaking into Victor Creel's house, Steve says its locked, but when he reaches his hand through the broken window, there is no keyhole in the knob or dead bolt that would lock the door.
At 37:02, reversed shot of Steve.