Detective, I require your assistance! 
The Brave and the Bold #173 is an issue of the series The Brave and the Bold (Volume 1) with a cover date of April, 1981.
Synopsis for Batman and the Guardians of the Universe: "One Of Us Is Not One Of Us!"
A Guardian of the Universe comes to Earth to recruit Batman to help him learn which Guardian is an impostor, and to restore Hal Jordan's memories of being Green Lantern. Batman, who is busy on a mission, asks the Guardian to help him first and with the Guardian's help, Batman manages to solve a case in record time.
Once free from his duties, Batman and the Guardian go to Ferris Aircraft, where they find Hal, but realize that he has lost his memory about the Guardians and his Green Lantern identity. The Guardian and Batman work together to bring back Hal's memory and when he finally remembers his identity, Hal also remembers that Sinestro is somehow responsible for his amnesia. The Guardian then realizes that Sinestro might also be involved with the impostor Guardian and several other troubles the Green Lantern Corps have recently had. It is then that Batman suggests going to Maltus, the Guardians' home-world and Green Lantern asks Batman to join them on their quest to stop Sinestro.
Appearing in Batman and the Guardians of the Universe: "One Of Us Is Not One Of Us!"
Featured Characters:
Supporting Characters:
Antagonists:
Other Characters:
- Commissioner Gordon (Cameo)
- Carol Ferris (Cameo)
- Thomas Kalmaku
Locations:
- Gotham City
- Ferris Aircraft Company
- Korugar (Flashback only)
- Oa (Flashback only)
- Oan Citadel (Flashback only)
Items:
Vehicles:
- Tiger-12 Reconnaissance Jet
Synopsis for Nemesis: "Knight's Gambit!"
Nemesis tries to get at Council member Noel Chesterton by saving a man he intends to kidnap.
Appearing in Nemesis: "Knight's Gambit!"
Featured Characters:
Supporting Characters:
- Valerie Foxworth (Flashback only)
Antagonists:
- The Council
- Noel Chesterton
- Samuel Solomon
Other Characters:
- Michael Boches (First appearance)
- Mr. Dover (Single appearance)
- Sir Robert Greene (Single appearance)
Locations:
Items:
- Razor-Knife
- Toxin Bullets
Notes
- "One Of Us Is Not One Of Us!" is reprinted in:
See Also
Recommended Reading
- Green Lantern Recommended Reading
- Green Lantern (Volume 1)
- Green Lantern (Volume 2)
- Green Lantern (Volume 3)
- Green Lantern (Volume 4)
- Green Lantern (Volume 5)
- Green Lantern (Volume 6)
- Green Lantern (Volume 7)
- The Green Lantern (Volume 1)
- The Green Lantern: Season Two (Volume 1)
- Green Lantern Corps (Volume 1)
- Green Lantern Corps (Volume 2)
- Green Lantern Corps (Volume 3)
- Green Lantern: Emerald Warriors (Volume 1)
- Green Lantern: New Guardians (Volume 1)
- Green Lanterns (Volume 1)
- Hal Jordan and the Green Lantern Corps (Volume 1)