I believe that the brother does have powers. And also that the brother and sister are connected some way. Like how she screamed at them that it wasn't a good idea to hurt her brother? I think she has the condition which Suresh was talking about at the start of the episode. Maybe losing control of her powers?
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Lightning Bolt? Haha yeah he does have the power over shooting lighting bolts from his hands. He slowly discovers this as well as his telekinetic powers during season 2 while in County Cork, Ireland. Also this is where he finds a love interest
The boogyman is bob from the company.. who is also Parkman's dad
Monica's ability is to replicate any physical motion. Evidence of this is when she does a double backflip like she saw on some wreastling show.
When Claire and West kiss she notices the mark on his neck (Like ted and matts) on his neck, and he tells her of a traumatic encounter he once had with a man in horn-rimmed glasses (Claire's foster dad)
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Hmmmm I've got more spoilers, but I don't want to ruin it all for you
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