S5, E10: When Amy bravely tries to heal an abused (and now extremely violent) racehorse Ty and Jack think she's finally bitten off more than she can chew. Meanwhile, Miranda shows up to bring Shane home early when she learns what her son's been up to on his summer vacation with Tim. Peter and Lou are at odds with Lisa over their plans to start building their home near the Dude Ranch. And Jack has his own issues with Lisa to deal with when he finds out she's been spending time with her ex-husband, Dan.