Mindhunter (2017-2019)

Mindhunter was never officially cancelled, but David Fincher’s FBI profiling drama went on indefinite hold after two seasons, leaving fans dangling with a budget savings of $40 million compared to a full third season. Its cancellation limbo is 30% longer than the average streaming series hold period, yet its cultural impact remains massive—each season averaged 12 million views within a month on Netflix, outperforming #4 The OA in viewer retention by 20%. The most frustrating dead-end in prestige TV.