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K.O. teams up with an unlikely ally to take on an old foe.
- Courtenay Taylor as K.O.
- Steven Ogg as Professor Venomous / Shadowy Figure
- Kate Flannery as Carol
- Lara Jill Miller as Fink
- Jim Cummings as Lord Boxman
- Melodee Spevack as Foxtail
- Justin McElroy as Billiam Milliam
- It Is revealed that Fink finds out about K.O. being her boss's son offscreen.
- K.O. reveals to Foxtail that Professor Venomous is his father.
- Fink unveils that Professor Venomous was Shadowy Figure from the beginning as his alter-ego.
- Professor Venomous's transformation is similar to T.K.O.'s
- When Fink says "That's not what I meant", her face briefly resembles Mouse Fitzgerald from the Adult Swim series 12 Oz Mouse.
- The origin of Shadowy Figure's birth is similar to the tale of Dr. Jekyll and Mr. Hyde.
- This episode takes place after "Big Reveal" since K.O. is spending time with Professor Venomous on a weekend.
- Lara Jill Miller's first name is misspelled as "Lari" in the end credits.
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