A member of Anonymous wearing a Guy Fawkes mask appears in this episode. The mask appeared in V for Vendetta which, like this episode, was written by the Wachowskis and directed by James McTeigue. This is in episode 2.5, not 2.4
This episode features a cameo by David Mitchell, author of Cloud Atlas, playing himself. Doona Bae was one of the principal cast in the film adaptation of Cloud Atlas.
When visiting the temple of Ganesha, Kala's mother-in-law asks her if this is the first time she's been back since the stabbing. Kala indicates that it is. In fact, Kala returned once before when she choked the older activist after he thanked her for bringing her father-in-law to the temple giving them the opportunity to attack him.