When White Martians Attack

Episode 26 of Nightwing & Batgirl.

In the Watchtower,there was a proximity alert.An unidentified flying object 50 kilometers away is heading towards it."We can fire the orbital cannon directly at it",Wonder Woman said."No.We'll only get one shot,and what if we miss",Superman said."Well we could use like 10% of the Watchtower's power for the shot",Mr. Terrific said."What about 50",Batman suggested.