Border Security: Australia’s Front Line “Major Mystery” S17E9 October 29 2025 on National Geographic

On Wednesday October 29 2025, National Geographic broadcasts Border Security: Australia’s Front Line!

Major Mystery Season 17 Episode 9 Episode Summary

The upcoming episode of “Border Security: Australia’s Front Line,” titled “Major Mystery,” promises to deliver suspense and intrigue as it explores a puzzling situation at Melbourne Airport. With the episode set to air on National Geographic, viewers can expect a gripping look at the challenges faced by border security officers in a bustling airport environment.

In this episode, a mysterious incident unfolds that puts everyone on high alert. The dedicated team at Melbourne Airport must work quickly to uncover the truth behind the situation. Their commitment to keeping the airport safe and secure is put to the test as they navigate through various clues and unexpected developments.

As the officers investigate, tensions rise and questions abound. The episode highlights the importance of teamwork and quick thinking in the face of uncertainty. Viewers will get a front-row seat to the behind-the-scenes efforts of border security personnel as they strive to solve the mystery and maintain safety for all travelers.

“Major Mystery” is sure to be an engaging episode filled with unexpected twists and turns. Fans of the series can look forward to an insightful exploration of the complexities involved in border security operations, all while witnessing the dedication of those who work tirelessly to protect the nation’s borders.

What Time is the “Major Mystery” Episode On?

The Major Mystery episode of Border Security: Australia’s Front Line will be broadcast on October 29 2025 on National Geographic at 10:00 PM at ET/PT.

Is the “Major Mystery” Episode New?

The Major Mystery episode of Border Security: Australia’s Front Line is all new!

Border Security: Australia’s Front Line Major Mystery Cast & Stars

Main Cast

Major Mystery Episode Videos & Previews

Watch Border Security: Australia’s Front Line Major Mystery Online

Watch the show online

Border Security: Australia’s Front Line Series Information

Follow Australian Customs and Border Protection officers as they attempt to enforce the country's various quarantine, customs, immigration and finance laws.