Bay of Plenty Delta team Mark and Epic are on an epic chase and a visitor to Christchurch Men's Prison is caught with some serious contraband.

A big night for a Waikato Delta team Kieran and Gabby, a cross-country pursuit, a rural track and a close encounter and a major find for drug dog Tai at Auckland Prison.

Dog Squad Delta team Aiden and Iko track a silly sinner who broke into a church and Corrections dog Jesse plays postmaster at Auckland Prison searching for illegal contraband.

Delta team Paul and Falon show how good they are at catching bad men, Corrections dogs Tiggy and Mac hunt behind the wire for contraband,

Police Delta team Dave and Isaac sniff out trouble in both Opotiki and Whakatane, while Corrections dog Tai sniffs out drugs at a prison.

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.

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.

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

Corrections dog Ciggy searches the cells for cigarettes at Waikeria Prison while Customs drug dog Rajax finds what he's trained to detect on the International mail belt.

Delta team Paul and Falon deal with a carjacker; drug dog Oscar locates drugs on a prison visitor; and DOC tracking dog Fern sniffs out young Kiwis gone bush.