S5, E17: When Amy’s dog Lobo is injured by a trigger-happy rancher, it’s up to Ty to save his life, meanwhile good old Jack has gone to Moosejaw to persuade Miranda to come back to Heartland to help sort out Tim's struggle. Mallory tries to raise money to help her get an apartment so she will not have to move to Nashville. Jake saves Mallory from a lot of trouble with her dad. Mallory moves away. Tim gives up drinking.