CCB 105: Choo Choo Bob Tonight / Basic Cable Cars
CCB 106: The Snow Must Go On / Big Trees Big Mess
415: End Game
The team searches for a motive after the family members of Clay Porter, Jr., a fugitive on the run for murder, are taken hostage by a gang of military thieves. Bill Nye "The Science Guy" Guest Stars as Bill Waldie, the Head of Cal Sci's Engineering Department. Sharif Atkins ("ER") Returns as Clay Porter Jr., an Ex-Marine Who Is On the Run For the Murder of a Serial Killer.
416: Atomic No. 33
414: Manhattan Queens
415: Open Secrets
When Danny and Baez investigate the kidnapping of a young girl who disappeared after school, it brings back difficult memories for Danny, who worked on a similar unsolved case many years ago. Meanwhile, Frank butts heads with Inspector General Kelly Peterson when he refuses to divulge information about a program that allows Frank to oversee intelligence officers abroad.
416: Insult To Injury
When Danny takes a call from a woman who is threatening to kill herself along with the man who killed her parents in a drunk driving accident, he rushes to find her. Meanwhile, Frank accompanies his grandson, Sean, on a class field trip and struggles to get the lead chaperone to loosen the reigns so the kids can have fun.
417: Knockout Game
418: Righting Wrongs
419: Secret Arrangements
420: Custody Battle
421: Above And Beyond
When Danny is placed on modified duty after investigating a case that was off-limits, he realizes he stumbled upon something that someone is trying to keep quiet. When he passes the tip on to his father, Frank is alarmed when he learns the enormity of this case and the internal involvement, on the fourth season finale.
504: Excessive Force
505: Loose Lips
506: Most Wanted
Frank and Danny are determined to put away an international felon who repeatedly manages to walk away from murder charges, but they struggle to come up with the necessary evidence to earn a conviction. Meanwhile, Erin debates going into private practice when she looks into college costs for Nicky, and Danny butts heads with his new boss. Rebecca Mader guest stars as Tori Parsons, Erin’s classmate in law school.
508: Power Of The Press
Frank faces public backlash after an officer’s body camera malfunctions during an altercation with a civilian. Meanwhile, Danny and Baez struggle to protect an informant after the U.S. Marshall’s Service decides not to put him in Witness Protection, and Erin investigates an old friend’s daughter’s claim of rape at a prestigious university.
509: Under The Gun
As Danny and Baez investigate the murders of three prominent community leaders who appear to be the casualties of hate crimes, Frank meets with a group who wants to make sure these incidents are not taken lightly. Meanwhile, after Linda is mugged, she decides she wants to carry a gun, even against Danny’s wishes. Victor Garner guest stars as a community leader.
418: Slow Burn