Customs drug dog Zaria sniffs out drugs at the International Mail Center and Mena the penguin tracker shows off her work at Kaikoura.

Corrections drug dog Jesse sniffs out drugs at Northland Regional Corrections Facility, while Customs drug dog Zulu finds them on the mail belt. Plus, a tribute to deceased police dog Gazza.

Flynn sniffs out trouble at the prison Mail Centre and MPI dog team Dee and Sam run checks on a cruise ship at Milford Sound.