Another thing I liked about this episode were the callbacks that people have mentioned already and some instances of parallelism.

I noticed two things concerning Scratch.

1) When Burt is talking to Pete on the landline. Pete tells him they need to get Scratch now. He ends with "Kill that bi*ch!" and Burt growls in response, "I WILL!" That is a callback to the scene when CJ is in the Colony hospital trying to rescue Burt. Burt, from within his cell, says "whoever you are, shoot that bi*ch!" and CJ shouts "I WILL!"

2) As for the parallelism (or maybe one could call it a callback):

When Scratch spots Burt lying on the ground after the fall of the Tower he tries to reach for Shirley on the ground next to him. Scratch kicks it away and then moments later knocks Burt out.

When Burt spots Scratch lying on the ground after falling from Dunbar Tower she tries to crawl on the ground for the gun. Burt kicks it away. Later Scratch reaches for her knife in her boot and Burt knocks her out.