Scorpion 4.21 (Preview) is the 21st episode of the fourth season of the CBS drama Scorpion. The episode is scheduled to air on April 24, 2018. The episode was directed by Christine Moore and written by Nick Santora. In the episode, the team is called to investigate a mysterious explosion at a chemical plant.
| Channel | Category | Duration | Views |
|---|---|---|---|
| Music | TV Clip | 00:20 | 3 |
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