Heartland struggles with competition from Pryce Beef just as Amy agrees to help Nathan Pryce in a sheepdog competition. Lou, Jack and Tim are feeling the strain as a water shortage is on the horizon.

Caleb returns to help Amy with a mysterious Icelandic horse. Weather conditions force Lou to build a firebreak with the enemy.

The family faces the hard reality of a drought at Heartland and the hunt is on to find the best spot to build a new well. Katie worries about her grandfather's health.

The weight of the Hudson rumour mill leads Jack to make a surprising decision. Amy works with a polo pony and sees a new side of Nathan in the process.

The whole family heads to the Hudson Rodeo. Emotions run high at the barn dance after Amy helps Nathan deal with a family emergency.

Lou, Amy and Lisa head to Vancouver for a girls' trip. Lisa is caught in the middle when truths are revealed between sisters that could threaten to tear them apart.

Amy works with a unique client whose sanctuary is at risk of closure while a secret Katie's been keeping is revealed and shocks Lou.

Tensions boil over when Heartland and Pryce Beef face off at the Hudson Farmer's Market and Shane makes a surprise visit.

Jack and Tim try to mend fences with Nathan on a fishing trip. Amy and Caleb save a horse in distress while Lou finds herself in a dangerous situation.