- Courtenay Taylor as K.O. / T.K.O.
- Ashly Burch as Enid
- Ian Jones-Quartey as Radicles
- Dave Herman as Mr. Gar
- Kate Flannery as Carol
- Steven Ogg as Shadowy Figure
- Enid's voice changes to resemble Harley Quinn's when she asks "What's up Mistah G?" to Mr. Gar.
- This is the fourth episode to feature the sandwich flashback. The other episodes were "We Messed Up", "Know Your Mom", and "Face Your Fears".
- When Shadowy Figure and K.O. are fighting, Shadowy Figure drops a line suggesting that he isn't working alone.
- However, he could have been talking about himself in third person.
- When K.O. is about to knock down the door, an instrumental version of the pilot's theme song can be heard.
- The scene where Shadowy counters and kicks K.O. away is very similar to the same fight scene between Kid Goku and Mercenary Tao, where Tao dodges Goku's attacks and kicks him away with his hands behind his back.
- After "T.K.O.", the events of the episode are mentioned by K.O. and Rad. Also, Shadowy Figure returns and Turbo K.O. makes a cameo in this episode.
- The title card incorrectly titles the episode as "Lets Have a Stakeout".