When Danger Man was on air, you could purchase Danger Man bubblegum in shops.
With every piece of bubblegum came a card (like a cigarette card but bigger). There were 72 to collect all showing a black and white scene from the series. Every card had a description on the reverse, which formed a story.
If you collected 24 bubblegum wrappers, you could send them of to receive a 'John Drake' personalized identity bracelet.
You can view each of the 72 cards by clicking here
Alternatively you can download a PDF Document by clicking here