Why was the strange, beautiful bird flying above London's canal, and why were the two bad-tempered strangers so interested in it? Jackie, Butch and Trevor get involved in a mystery.

A chest of drawers in a junk shop proves more interesting than it first appears.

Mr Trim wants to know more about the strange bird.

The children watch as Mr Trim knocks on the crooks' door. Is he in danger?

The children try to figure out why Mr Trim is so friendly with the crooks.

The children decode the telegram and discover there is a threat of danger.

The crooks chase the children. Someone gets caught. And who really is the Birdman?

Can the children save Jackie from the clutches of the bird thieves?

The children try to find out where the crooks plan to steal the falcon from.

The children are trapped in the zoo. Has Mr Trim tricked them again?