The investigation leads to a crucial doctor being kidnapped.
The abducted doctor is developing dangerous neurotechnology with potential military weapon applications. [S12E7] Overdue
The case starts with the murder of a military contractor/information broker. The investigation leads to a crucial doctor being kidnapped
Espionage, high-tech weapon threats, murder investigation. Key Plot Points high-tech weapon threats
Note: The search results also included, but were not limited to, discussions on S12E7 for different shows (e.g., Doctor Who, Below Deck) and the date check confirm these are distinct, unrelated shows. This report focuses on the "NCIS: Los Angeles" entry matching the "Overdue" title in the search snippet. "NCIS: Los Angeles" Overdue (TV Episode 2021) - IMDb