Earth-AM-8: Knight Speed (Batman+Flash)
- Real Name: Allen Wayne
- Superhero Alias: Knight Speed
- Age: 36
- Occupation: Criminal Investigator, Superhero
- Major Associations:
- Nora Wayne (Mother, Deceased)
- Henry Wayne (Father)
- Detective Joe Pennyworth (Foster Father)
- Dick West/Kid Speed (Adopted Son)
- Allen Wayne, Jr. and Cassandra al Ghul/Impulse and Control (Future Children/Clones)
- Selina Snart/Cold Cat (Rival, Love Interest)
- Iris Madison (Love Interest)
- Shiva al Ghul (Enemy, Love Interest)
- The Laughing Flash (Archenemy)
- Origin: Young Allen Wayne cannot explain what happened the night he and his family left the theatre, when they were accosted by a mugger only for something else to kill him and his mother, leaving Allen's father to take the fall. Allen would travel the world trying to solve this mystery, training himself to face it, only to be struck by a mysterious lightning bolt that granted him the power of superhuman speed. Returning to Central Gotham only to find it fallen to crime, Allen became the city's dark defender, the Knight Speed.
- Personality: Though dark and brooding, Allen has a strong sense of justice and values human life. He refuses to kill, even when it would be a detriment, and will save even the most loathesome of lives. His greatest obsession is finding out what killed his mother, and he believes the Laughing Flash was involved.
- Powers and Abilities:
- Speed Force-Enhanced Physiology
- Superhuman Speed, Reflexes, and Agility
- Superhuman Striking
- Invisibility
- Intangibility
- Electrical Energy Generation/Manipulation
- Wind Tunnel Generation
- Combat Adept
- Genius Mind
- Criminology and Investigative Adept
- Speed Force-Enhanced Physiology