Sylar discovering he has regained his powers by transporting a can of spinach is a tacit in-joke to Popeye.
This is the only episode in the second season to feature all the main characters.
David Anders (Takezo Kensei/Adam Monroe) & Kristen Bell (Elle Bishop) also worked together on episode 2.11 Fifty Shades of Grey Matter (2016) of iZombie (2015).