Every name in Parasite charts again. In The Influencer, 1

Join every Korean title that has reached a Netflix Top 10 to its recorded cast, and one question becomes answerable that no single title can answer: how much of this production’s cast turns up anywhere else?

Across the 311 productions with at least five recorded cast members, the median has 16.7% of its cast appearing in nothing else in the set. The spread around that median is the interesting part.

Every credited name in each of those appears in at least one other Korean title that charted. Now the other end:

What the two ends have in common

The 0% group is prestige feature film and flagship drama. The other end is reality television and youth casting. The Influencer is a competition show whose participants are influencers, not working screen actors, so it is no surprise that eight of its nine recorded names turn up in nothing else here. One does — when we first published this piece it was nine of nine, and the ninth arrived with three more weeks of chart data. My ID is Gangnam Beauty is a campus series that cast a lot of newcomers, and seventeen of its twenty-seven recorded names appear in nothing else here.

That is not a judgement about either. A production that draws entirely on the established pool and one that brings in twenty new faces are doing different jobs. What the join makes visible is that the difference is enormous and completely invisible from any one title.

Across the whole set, 673 of 1,391 people — 48.4% — appear in exactly one of these titles. Nearly half of everyone credited in Korean titles that reached a Netflix Top 10 did so once.

The limit that matters most here

Wikidata’s cast lists are incomplete, and that cuts directly against this measure. If a person was in five of these titles and Wikidata records one, we count them as a one-timer. So 48.3% is a ceiling on the true figure, not an estimate of it, and a production’s “only here” share is inflated by whatever its collaborators’ entries are missing.

The direction of the error is knowable even if the size is not: recording is fuller for well-known people, so the productions that look most self-contained are the ones cast with less-documented names — which is the same population the measure is trying to describe. We report the figure and the flaw together because separating them would make the number look better than it is.

Two smaller limits. “Appears in nothing else” means nothing else in this set — 943 Korean titles that reached a Netflix Top 10, not a career. And reality formats list participants under the same cast property as actors, which is why The Influencer sits where it does; that is Wikidata’s modelling, not a finding about casting.

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Half the people appear once. The pairs that do repeat are barely more common than chance. Read the null model behind that claim →

What changed on 2 September 2026

We re-collected the cast data on 25 August 2026 and recounted every figure here. The set moved from 1,395 people to 1,391 and from 668 titles with a recorded cast to 666, because Wikidata’s cast statements changed underneath us in both directions.

The finding did not change. Just under half the people in the set — 48.4%, where the earlier count said 48.5% — still appear in exactly one of these titles.

What changed on 3 September 2026

We re-collected the keyed title roster from Wikidata. One more charted title matched a Korean Wikidata item, and it has no cast recorded.

The count of titles with no cast recorded moved 276 → 277 with it. That figure is not stated in this piece, so it is not in the table above; it is corrected where we do state it.

The join did not change. What grew is the roster it is measured against, so the gap we name here is one title wider than it was.