It starred then child actors Pamela Franklin, Teddy Green and David Griffin as three teenagers who become amateur detectives in Swinging London during the mid-1960s.
[1] Its theme song, written and performed by Brian Epstein's Paddy, Klaus and Gibson, later became a popular tune and one of the group's first hits after releasing it as a single.
[2] The series concerns the adventures of three London teenagers: Kate (Pamela Franklin), Johnny Martin (Teddy Green) and Mark Dennison (David Griffin), who use their unique talents to solve crimes in their neighbourhood.
With the help of her new friends, she exposes a real estate agent who was using the camera obscura in the attic room to spy on local tenants and blackmail them.
Performing at the opening night of the "Big A" nightclub, they find out that someone is planning to steal a picture from the club as part of an art fraud scheme.
Crisp, George F. Kerr, Jack Trevor Story, Margot Bennett and John Gray – were hired to create an action serial for children and teenagers.
The production crew included Richard Martin, Derek Martinus, Morris Barry and Paddy Russell, all of whom also directed stories for Doctor Who.
Franklin later moved to the United States where she guest starred in numerous American television series such as Hawaii Five-O, Police Woman, Fantasy Island and Vega$.