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Issue: Batgirl #37
Subtitle: Thicker Than Water
Date: April 2003
Feature Characters: Batgirl (Cassandra Cain)
Supporting Characters: David Cain, Batman (Bruce Wayne), Oracle (Barbara Gordon)
Villains: N/A
Guest Appearances: N/A
Other Characters: Jill, David Sullivan

David Cain makes a special visit to Cassandra's cave to deliver a birthday present, an assassin knife. The reason behind his actions are under debate by Batman until, during a case when a father abducts his daughter from an uncaring mother, she realises that Cain was actually her biological father.

"It's a knife."
— Batman

Batgirl 37 1 - Batgirl 37 2 - Batgirl 37 3 - Batgirl 37 4

Cover Art:


- This story occured on the 26th, Cassandra's birthday

Batgirl 37

- Kelley Puckett

- Damion Scott

Chronology:Full List
- Batgirl #34
- Batgirl #35
- Batgirl #36
- Batgirl #37
- Gotham Knights #33
- Gotham Knights #35
- Gotham Knights #36

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