When did The X Factor Season 15 Episode 21 air?
The X Factor Season 15 Episode 21 aired on November 10, 2018.

Dermot O'Leary hosts as the nerve-racking live shows continue.
Direct answers for episode-level questions and details.
The X Factor Season 15 Episode 21 aired on November 10, 2018.
This episode runs for approximately 60 minutes.
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