The Butterfly Effect

April 1453. The Ottomans, led by Sultan Mehmed II, lay siege to the city of Constantinople.

In the 1960s, the Aral Sea, lying astride Kazakhstan and Uzbekistan, is the fourth largest lake in the world.

On April 23 1519, Hernan Cortes lands in the Yucatan with the intention of bringing the Aztec Empire to heel and seizing all the wealth of the territory.

1962. The Cold War. American spy planes spot launch ramps in Cuba that are designed for nuclear missiles

May 10 1940. The Second World War. The Germans launch an offensive into Holland, Belgium and Luxemburg.

Women of the European countries demand the right to vote, working conditions and education, just like the Suffragette movement in England.

A dying trapper gives Dev and Cece the location of a valuable gold claim.

Petra thinks her ex husband has abducted Connor and enlists Bobby's help.

Troubled rock star, Delilah Fury, embarks on the northern leg of her comeback tour.

Bobby and Mel are stranded in an isolated community after their DC-3 is shot up on the airstrip.

Krista's mother pays a visit to Yellowknife and throws Krista's life into turmoil.

While a winter storm hammers Yellowknife, a couples' weekend in Calgary goes sideways.

Caitlin is taken, but her kidnappers don't want money - they want Nelson.