9. Freefall

Complete story — includes the ending

Max Cassidy vanishes after leaving a message on his wife's voicemail, with both Jack and Ann frantic to find him. While investigating, Jack realizes that Max was having an affair, and that he's gotten much deeper into a case than he should have following the murder of his partner, Jimmy, a man Max had felt was too green for undercover work. Both Jack and Ann fear the worst as the team tries to hunt down Max. Martin takes a fall that aggravates the injury to his hip leading to problems in further episodes.