Fastback was a fast turtle superhero and a member of the Zoo Crew.
A meteor from another dimension entered the parallel reality of Earth-C (a world inhabited by anthropomorphic animals) and crash-landed on the planet. The fragments of the meteor produced waves of radiation which endowed several individuals with super-powers, including Timmy Terrapin. Timmy became the super-hero known as Fastback and joined with Cap'n Carrot and his Zoo Crew.
This section of the history takes place during Convergence, a massive crossover event revisiting characters from past eras and realities. The villains Brainiac and Telos plucked them from their own timeline and stored them together, causing them to cross over into each others' reality. Its precise chronological placement and canonicity may be unclear.
Fastback was one of many taken to Convergence by Brainiac and Telos and lost his powers for a year. After the dome went down, he encountered Wally West and his kids and helped them defeat Flashpoint Wonder Woman and her army.
- Fastback's uncle, the Terriffic Whatzit is a shell-less turtle who wears a costume which looks exactly like the one worn by the Golden Age Flash.
- 35 Appearances of Timothy Joseph Terrapin (Earth-C)
- 8 Images featuring Timothy Joseph Terrapin (Earth-C)
- 1 Quotations by or about Timothy Joseph Terrapin (Earth-C)
- Character Gallery: Timothy Joseph Terrapin (Earth-C)