Channel 5 TV Guide

At an aquarium in Portaferry, Co Down, a small group of penguins offers a window into a bigger global story about these flightless birds

Susan visits Cornwall, on the trail of romantic hero Ross Poldark. First up is the peaceful market town of Helston, which comes alive one day a year as residents take to the streets, dancing through the shops and houses to welcome spring. Next, she visits a cove at the southern end of Cornwall, a filming spot for the latest Poldark adaptation

PCs Jamie Leslie and Jan Simsela follow a flatbed truck that's all over the road and goes on to hit a curb, and are amazed when the driver, who is very chatty, admits he has had a few drinks in the cab on the way home. On the A19 PC Tommy Wade stops a VW Golf that's being used by multiple people without insurance. But the driver is less than forthcoming with his details. And at 3am in Gateshead Jamie and Jan chase a speeding motorist on the wrong side of the road and ignoring red lights

Officers pursue a car on the M1 that is veering across lanes, flashing other motorists and pushing the speed to 115 mph, with advanced driver Scott getting rammed twice by the reckless fugitive. Meanwhile, three dogs are put through their paces in training, with cocker spaniel Socks and handler Lucy putting their training to use in a real-life operation when a man accused of selling drugs to students is stopped and his car searched

Late evening on a quiet, leafy street in Dudley, gunfire rips through a young woman's front door, with one shot striking her in the hip. West Midland police's major crime team takes charge, tasked to find out who could have committed such a crime, and a manhunt begins when CCTV footage shows a vehicle speeding away. From there, the investigation intensifies and a small but significant mistake by the getaway driver means the vehicle can be tracked

The work of the country's highly trained police bikers, the UK's fastest responders who are always at the ready to race at top speed to save lives and catch suspects on the run. Near the end of a busy bank holiday weekend, biker cop Paul Buckley is called to a serious crash involving a car and motorbike in the North Yorkshire countryside. Tragically, the biker has died. Paul and colleagues begin piecing together how and why the collision occurred to work out if either the driver or rider could be to blame. Near York, after a disqualified driver fails to stop for police and goes off road and on the run, biker cop Paddy Green hunts down the runaway driver

Reports come in about a man in a residential street armed with a hammer and a knife. The firearms unit rush to the scene, but even when surrounded by armed police the man doesn't give up, and he threatens the officers. In Cheltenham, PC Raath and PC Davis look for two 15-year-old girls, who have absconded from a care home