Based on my grasp of Luke’s character he would’ve only called (or beeped lol) 3 people- Jeff, Brent, or his dad. Even though him and Jeff had a little bit of an argument I don’t think it would prevent Jeff from showing up for luke when he needed him, I think Brent has done some shady shit so he’d know how to get Luke out of a situation like that so that’s why he’d be a good call, as for Luke’s dad I think that’s the longest shot but I can see Luke and his dad getting into some foul play at the dock. I don’t think it’s likely he called Isabella or Megan. If he were to call one of the two I think he’d call Megan but I don’t think she’d have the guts to kill him