"Beyond Grounded" from Batman Beyond vol.2 #1 (DC, 1999) by Hilary J. Bader, Craig Rousseau and Rob Leigh
I've seen all of the Bruce Timm-designed DC animation series EXCEPT Batman Beyond. Well, I do have to keep something for my retirement! DC seems to be exploring the Beyond universe well beyond the animated series' expiration date, with digital exclusives about Batman, Superman and the Justice League of that possible future. The series has been on my Amazon wishlist for a while now, so maybe some day soon, I'll make a gift of it to myself.