When Garcia experiences anxiety over a case that's personal to her from her past, Morgan visits to lend emotional support.
The NCIS team is forced to re-examine a hit-and-run murder case when a former FBI agent turned lawyer confides in Gibbs that her client's confidential alibi is solid.
Peter must go undercover into the world of corporate espionage after a tech company's head researcher is murdered.
Harry Langford helps Five-0 investigate a series of murders that follow the plot of a fabled unpublished crime novel from the 1920s; Tani and Junior's friendship takes a meaningful new turn.
The team investigates a missing persons case involving a teenager rumoured to have been recruited by a terrorist cell.