Circus of Darkness (Sarkas Kegelapan) is the thirteenth episode of BoBoiBoy Galaxy. It aired on TV3 at June 22, 2017.
- Fang (Minor)
- Cici Ko
- Papa Zola (Minor)
- Cattus (Minor)
- Tarung (Minor)
- Captain Kaizo (Re-debut; minor)
- This episode marks Captain Kaizo's debut in BoBoiBoy Galaxy since his last appearance in the final episode of the original seriess