"Living Proof," the latest episode of Arrow, paid homage to a forgotten DC cartoon.
1 / 10
The homage came during the scenes set in the future storyline of Star City 2040.
2 / 10
The future vigilantes of Star City have nearly been wiped out by mysterious helmeted soldiers.
3 / 10
These soldiers were later discovered to be empowered by Felicity Smoak's Archer network.
4 / 10
"Living Proof" gave a name to these AI-enhanced soldiers - Zeta.
5 / 10
The name Zeta may sound familiar to fans of Batman Beyond.
6 / 10
Zeta was a robot assassin, who developed a conscience and rebelled against his programming.
7 / 10
Zeta inspired a spin-off cartoon, but was nowhere near as popular as Batman Beyond.
8 / 10
The season finale of Arrow will see Mia Smoak having to stop Zeta for good.
9 / 10