Suzanne Coy

When Lou decides to make a promotional video to advertise Heartland, nobody is very supportive of the idea. But Lou is determined, perhaps even more than usual. She manages to recruit everyone at Heartland to spruce up the ranch, including Mallory and Ben who are assigned the messy task of moving the manure pile.

Heartland's future is put in jeopardy when Lou mistakenly sends Mrs. Roche's horse, Swallow, home before his fear of traffic is fully cured. An unknowing Ashley rides Swallow and is violently thrown off when the horse is spooked by a truck.

A 10-year-old girl disappears with her father after her mother is killed, leading the SRU members to discover they were part of a witness protection programme. As they try to track the family down, they learn the child witnessed a triple murder years previously, but the people responsible for the crimes have finally found her and want her dead. Elsewhere, Parker is reunited with his estranged son.

When Lexa is unknowingly drugged with a lethal substance, the team must race to find the antidote before it's too late.