The "paper" mentioned at the end of the episode is the official document that would transition Deeks from an to a full-time NCIS Special Agent .
LAPD Lieutenant Bates acknowledges that Deeks has found a "home" with the NCIS team. He encourages Deeks to finally sign the papers and make it official. Ncis Los Angeles 3x10
The mole is revealed to be Quinn from Internal Affairs. After the case is closed, Deeks is welcomed back to the team. 📄 The Significance of "The Paper" The "paper" mentioned at the end of the
The shooting was actually faked to get Deeks back into the LAPD undercover to find a mole. The mole is revealed to be Quinn from Internal Affairs
In this episode, the team works a joint operation with the LAPD to stop an explosives sale. During the sting, Deeks appears to shoot an unarmed man, leading Hetty to "fire" him and the LAPD to cut ties with NCIS.
💡 While the team "put together" the operation to save Deeks' career and catch a mole, the episode ends with Deeks being told to "sign the damn papers" to solidify his place in the NCIS family. "NCIS: Los Angeles" The Debt (TV Episode 2011) - IMDb
Kensi is left in the dark and is devastated by Deeks' supposed firing, causing significant tension between them once the truth is revealed.