- The First Law of Dirk (first and last appearance)
- Kirk and Dirk's portrayers, Logan Paul and Jake Paul, are brothers in real life.
- Dirk mentioned a brother getting married in the episode In Your Space!, and in the episode Promposal Problems he stated he had promised his brother that he'd watch a show with him. These are most likely references to Kirk, but since he wasn’t called by name, this is just speculation.
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