1. Episode 1

Young Tom Dawes is enthralled by the sight of a fine schonner sailing up the Avon Gorge. Soon he and his father become mixed up in the mystery of a missing girl, a half recorded message, and intruders at Bristol Docks...

2. Episode 2

The adventure continues as Sid Dawes finds the runaway girl, Lynn, and Tom learns more about the mysterious recorded message. Trouble is looming for them all: the villainous Colonel Gaines has become suspicious - and he's a dangerous enemy.

4. Episode 4

Tension mounts as Tom tries to find where Lynn's kidnappers have taken her. Confronted by Colonel Gaines, she receives a clue to the mysterious recorded message...

5. Episode 5

With Southways now out of the way, Gaines' men turn their attention to Lynn. Young Tom picks up the trail at last...

6. Episode 6

Tom and his father are getting ever closer to finally solving the mystery of Lynn's disappearance...

7. Episode 7

Sid and Tom chase the evil Colonel Gaines, who is carrying captives aboard his sailing ship.