Greig and Dave are on the receiving end of passenger anger when fog over Europe causes scores of flights to be cancelled. Stuart is inundated with cats and dogs as the pet-passport scheme gets into full swing.

Stuart is called to the customs hall where a passenger has been caught attempting to import live fish, and Mina tackles the case of a missing buggy.

Sarah is hot on the trail of a shoplifter who has been helping himself in Terminal Three.