My patience is already strained by one super-teenager. It really won't gracefully extend to six. 
Impulse #21 is an issue of the series Impulse (Volume 1) with a cover date of January, 1997.
Synopsis for "A Little Knowledge"
Stranded in the present, The Legion of Super-Heroes leader Cosmic Boy takes the team in search of Impulse, mistakingly believing he helped their member XS return to the future. They find an Impulse who is only too eager to join their ranks as a legion member, but unfortunately knows nothing of time travel.
Appearing in "A Little Knowledge"
Featured Characters:
Supporting Characters:
- Max Mercury
- Legion of Super-Heroes
- Cosmic Boy
- Saturn Girl
- Gates
- Spark
- Brainiac 5
- Koko (First appearance)
Antagonists:
Other Characters:
- Flash (Barry Allen) (Statue only)
- Flash (Wally West) (Statue only)
- Flash (Jay Garrick) (Statue only)
Locations:
Items:
Vehicles:
Notes
- Story continues in Legion of Super-Heroes (Volume 4) #88.
- Special thanks given to Otto Binder.
Trivia
- The Legion of Super-Heroes' costumes are based on the design of Impulse's costume.