Based on the ratings provided, "Border Security: Australia's Front Line" seems to be consistently decent to good throughout Season 1. The ratings for the episodes range from 7.4 to 8.2, indicating a decent level of quality.
Bingeable rating: 70
Best Episodes
8.2
S1 E2
UK Girl: Part 1/Bug Investigations/Nelson: Part 2
7.8
S1 E3
UK Girl: Part 2/Trochus Shells/Internet Lover
7.5
S1 E4
Lord of the Rings/Korean Impostor/Numchucka Couple
Worst Episodes
6.9
S1E7
Shampoo Man/Smokin' Daryl Part 2/I Want to Go Home
7.4
S1E5
The Man Who Smelt Too Much/Chilean Coke/Cocaine Man
7.5
S1E1
False Passport/Fruit Fly/Nelson Part 1
Best Episodes
8.2
S1 E2
UK Girl: Part 1/Bug Investigations/Nelson: Part 2
7.8
S1 E3
UK Girl: Part 2/Trochus Shells/Internet Lover
7.5
S1 E4
Lord of the Rings/Korean Impostor/Numchucka Couple
Worst Episodes
6.9
S1E7
Shampoo Man/Smokin' Daryl Part 2/I Want to Go Home
7.4
S1E5
The Man Who Smelt Too Much/Chilean Coke/Cocaine Man