The fauna of Rishi includes another re-use of the neebray manta model -- the fourth so far for the series. It can be seen as a tiny creature on the moon of Rugosa in "Ambush," deep space leviathans in "Shadow of Malevolence", and fluttering over Tatooine in the feature film.

Drop-pods used to deliver droids is an idea that echoes the deployment of probots in The Empire Strikes Back. The model of the commando pod is a re-use of the pod-hunters seen in "Rising Malevolence" and the boarding craft that will appear in "Cloak of Darkness," suggesting a modular, versatile design.

CT 327's identifying number uses the very common digits 327 -- numbers that conspicuously appear throughout the Star Wars saga.

Careful inspection of the backgrounds in the ops section of the tracking station shows some Twi'lek model pinups photos on the work station walls.

Rex and Cody briefly mention a previous dire situation on Tibrin. Tibrin is the Ishi Tib home world.

Cody, a commander, outranks Rex, a captain.

Rex touches Echo's armor after killing a Rishi eel, leaving a handprint of eel blood on his armor that remains throughout the rest of the episode, making Echo easier to identify.

The holographic VJ hosting the music broadcast is a BD-3000 droid, nicknamed a "Bettie Bot"

The text on Hevy's detonator screen says, in Aurebesh, "Atte Rul3z Some Text."