Shane Grenier

Shane is Grenier introduced in season 4 as Miranda's son and is later revealed that his biological father is Tim. Shane begins bonding with Amy over horses, especially Pal, before knowing they had the same father and acted as they were family. When he finds out that Tim is his father, he gets angry at Tim and Miranda from keeping it from him. However, Amy had a feeling and knew it was true. Lou accepts Shane and includes him in on her own baby-naming ceremony as part of the family with his own stone above the fireplace. Soon afterward, he leaves with Miranda.

Miranda and Shane show up at Heartland and Tim find's that Shane is his son. Just as Tim starts to accept the fact, Miranda disappears, taking Shane with her. Tim spends the next 5 months searching for Miranda and Shane and is about to give up when Shane, having run away shows up at Heartland. At this point, he does not know that Tim is his Father; he just knows that Heartland is the one place he was happy and that since leaving there his mom has moved him 5 times in 5 months. Shane spends a couple of days with Tim before being sent back to his mother. At this point, Jack “kidnaps” Tim for a road trip, taking him to Moose Jaw and making him try to work things out with Miranda, as he doesn’t want to see the same thing happen with Shane what happened with Amy and Lou. Miranda won’t listen to Tim so while Tim is sleeping, Jack goes and talks to Miranda on his own, trying to convince her to give Tim a chance. Cut to Lou’s Baby Naming Ceremony episode. Everyone is getting ready for dinner when Amy runs into Miranda and Shane at Maggie’s Diner and invites them back to Heartland for dinner. At dinner, Tim, thinking Miranda had already told Shane the truth, accidentally let’s slip that Shane is “our son” to Miranda, revealing the secret to everyone. Shane is upset, Lou is shocked, Amy isn’t very surprised as she had a feeling something strange was going on. Lou gets over it and includes Shane as part of the family. Shane and Miranda leave. A couple of episodes later, Shane is back to spend the summer with his family and get to know them. This is when all the problems go down with the stolen horse and being shot at. Miranda sees the video on Facebook, declares Tim an unfit father, and cuts off all contact between him and Shane so he tries to get Joint custody. He even goes as far as asking Janice to marry him to prove he has a “stable family life” but when she finds out and dumps him he starts drinking again.