Border Security: Australia's Front Line Season 21 Episode release dates & where to watch

1. Episode 1

Officers are concerned by a passenger's bizarre behaviour when traces of a drug known as 'Charlie Sheen' are found. A gruesome find in the mail room may be linked to witchcraft. Immigration suspect a baby-faced tourist may be an imposter.

2. Episode 2

A bungling drug mule tries every trick to avoid being caught. An elderly gambler’s luck runs out when Immigration uncover his ongoing scam. Biosecurity intercept a delivery from Russia which is suspected to be part of the illegal trade in endanger animals.

3. Episode 3

A bunch of Aussies returning from Thailand are all packing a shocking concealment. A man on the run from Immigration detention tries to escape capture. Officers smash a sophisticated drug syndicate.

4. Episode 4

When a woman pushes away a sniffer dog officers hone in on what she has stuffed in her undies, a young man’s past is exposed and two Indian passengers will say just about anything to get out of a fine.

5. Episode 5

A drug detector dogs sits at a woman’s bags and officers need to investigate further. A nervous passenger attracts the attention of Biosecurity and what he’s hiding may be deadly.

6. Episode 6

Two brothers from Thailand claim they're just tourists but after talking to their sister, Border Force discovers something that makes their story likely to be a lie.

7. Episode 7

A nervous man says he's here to visit his wife for their wedding anniversary but what's in his luggage may spell the end of his trip. An officer's skills stop a drug delivery through the mail.

8. Episode 8

9. Episode 9

10. Episode 10

11. Episode 11

12. Episode 12 Finale