The police arrest a passenger who's become violent when boarding a flight to South Africa. Greig looks after a cargo of valuable racing pigeons and Stuart has to deal with a magnificent Russian sea eagle.

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.