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Hey Arnold!/Bio Square
From The TV IV
| Bio Square | |
| Season 3, Episode 16B | |
| Airdate | November 30, 1998 |
| Written by | |
| Directed by | |
| ← 3x16A Part-Time Friends |
3x17A → Phoebe Takes the Fall |
| Hey Arnold! — Season Three | |
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Bio Square is part of the sixteenth episode of the third season of Hey Arnold!, and the fifty-fifth episode overall.
Guest Stars:
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