When Emma is talking with Spike and Snake in the kitchen, her mom mentions she was 14 when she had Emma, but earlier in the series when Emma finds out about who her real father is and is fighting with her mom about the fact she never told Emma the truth Spike yells that she was 16 when she had Emma (see quotes).
Near the end, when Emma and Holly J are talking by the truck, right after the rest of the cycling team arrives, you get a quick glimpse of Stefan Brogren in the background popping up out of nowhere. He quickly scurries behind the truck as he realizes that he's not supposed to be on camera (yet).