Emergency services receive a harrowing call from a young woman who has discovered her flatmate dead in their home in Gateshead. A tiger on the loose in a residential US neighbourhood causes panic.

The horrific story of how a chimpanzee made a brutal attack that would change lives forever. Plus, a chilling call from an online predator that revealed a shocking murder confession.

A beautiful September morning in Kent turns to carnage when fog suddenly hits the Sheppey Crossing, creating one of the biggest road traffic accidents in UK history.

As runners neared the finishing line at the 117th Boston marathon, two bombs were detonated. Dramatic 911 calls and interviews tell the traumatic story of the attack.

A dramatic 911 call reveals that a helicopter crash has taken place, as a wealthy entrepreneur and his friends fly to visit his ranch in New Mexico. In north London, a worshipper becomes ill outside a mosque.

In one of the deadliest shootings in US history, a gunman opened fire at Pulse nightclub in Orlando, Florida, holding hostages in the restroom for over three hours.

In California, a woman who has just given birth is threatened by wildfire. Elsewhere, in Georgia, a mother calls emergency operators to report an attempted murder by her sons.

A gunman opens fire at a bank in Ohio, a Florida woman is attacked by a black bear on her doorstep and a man spots burglars breaking into his neighbour's Texas home.

In Florida, a man admits to shooting his daughter and her six children, while a Colorado woman hides in fear for her life when an intruder breaks into her home.

In one of the deadliest shootings in US history, a gunman opens fire at Pulse nightclub in Orlando, Florida, holding hostages in the restroom for over three hours.