Board Thread:General Discussion/@comment-25926288-20161031005929/@comment-25926288-20161031153023

I headcanon it like:

August 1983: Nemo finds orphan Liam. They leave ending up in Neverland.

September 1983: They bond. Peter Pan realize this isn't Henry and courses Liam with a horrible fate: To grow up. Nemo begs for mercy. Pan lets them leave.

October 1983: The curse is billowing over the EF. Nemo and older Liam return under water as the curse rolls by and disappates. Then just moments later, time freezes.

Sometime after Emma starts time during the Curse (Nov 2011): Liam and Nemo bond and eventually run into Hook.