Board Thread:Show-Related Questions and Answers/@comment-26967699-20150907211835/@comment-5370037-20150908234144

CadoDoan, I totally know what you mean. Coz Storybrooke is under a Cloaking Spell supposedly as can be seen in "Welcome to Storybrooke". But I think only people who can see magic in a LWM is ones who believe in it. As in Issac's case seeing the Door, and Emma not seeing August's wooden leg.

Since Henry is the Truest Believe, I can see that as the reason why he could return.