|"The Lesson: Tunnel Vision part one"|
|March 19, 2011|
|Written by||Bryan Q. Miller|
|Cover by||Dustin Nguyen|
|Interior Art by||Ramon Bachs|
|Colored by||Guy Major|
|Lettering by||Dave Sharpe|
|Edited by||Katie Kubert, Janelle Siegel|
|Previous Issue||Batgirl #18|
|Next Issue||Batgirl #20|
Patience may be a virtue, but can Batgirl stand still long enough to stop a super-speedster foe? The mysterious Order of the Scythe unleashes its first weapon in their war on Batgirl--Slipstream! But Batgirl's got backup: the Grey Ghost!
Summary of Stephness: Batgirl faces the speedster Slipstream, and even with Clancy's assistance as the Grey Ghost, she is struggling. Until she finds out the upgrades from Batman: Incorporated!