The Once bosses are in no rush to write toward a predetermined end date, as the ABC drama they previously called home, Lost, famously did, announcing three years in advance that its story would end after Season 6.
“I don’t think we want to set out a particular end date for this show. I mean, we have in our mind how we would like to wrap up the stories of these characters. But without having the specifics of exactly how we get there, it’s really not possible to [set a series finale date]. It’s more about building everything towards what we think would be a satisfying conclusion.”
Whether the Cancellation Trapdoor gets hold of Once before an end date is agreed is another issue that it will have to grapple with again next season.