The first time I saw him telling Bae the story about his father, I was practically yelling, “LIIIIIEEEESSSS” at the screen. Over time, I’ve thought about it too much though, and reckon it could make for an interesting storyline if it’s true, or at least what Hook believes to be the truth of what happened.
Also, I don’t see a mid-30′s actor playing against Colin as a father either. A brother or friend, on the other hand, works perfectly. IT could also parallel some betrayal in present day storyline too, if that skeleton key clue was a nod to the storyline in the episode we saw the key.
Depends if they intend to age Colin down, and if so, how far they push it. If they wanna make him around 18, that makes a mid-30s father possible. I do also like the brother idea though, and also the “not even related, just a father figure type” idea as well. The fact that they specified Liam’s hair colour makes me think he’s likely to be a blood relation. If they’re brothers, it could be that the older brother left the family to go into military service, and Killian only goes to find him after both of their parents are gone? Liam’s the “good” son who became an honourable, military man, and Killian’s the “bad” son who became a pirate?
Did they say we’ll get to know how he became a pirate, or just backstory in general?
They said we’ll find out how he became a pirate within the first 5 eps.