Episode list for TROOPS: NY season four. Episodes are noted as to which team is in them.
| Episode Number | Title | Air Date | Description | Team | Notes |
| 4.1 | South Bronx Story (Part 3) | October 14, 2008 | Davin and Ryan prosecute the Bronx D.A. for his role in allowing a street gang to get military grade weapons. Meanwhile, Tyler adjusts to a new partner who has a habit of driving him crazy. | Miguel/Tyler/Max | |
| 4.2 | Tevin's Regret | October 21, 2008 | Tevin walks out on his friends and family and isolates himself after he kills a suspect who was threatening to kill Richie. After realizing he can't get through to his own son, Davin asks Mike to talk to him. | Tevin/Richie | Guest Star: Bam Margera as Michael Piett |
| 4.3 | Death House | October 28, 2008 | After his grandfather dies suddenly in a nursing home, Tyler asks Firmus Piett to go undercover in the home and uncovers a medical experiment gone horribly wrong. | Tyler/Richie/Firmus Piett | |
| 4.4 | New Girl in the 501st | November 4, 2008 | A new female officer is assigned to the 501st and A.J. tries his best to make her feel welcome. | A.J./501st | |
| 4.5 | Witnesses Wanted | November 11, 2008 | After a street gang murders a rival, witnesses refuse to come forward for fear of reprisals. Until Davin sends in the 501st, that is. | Terry/Max | |
| 4.6 | Not What She Wanted | November 18, 2008 | With Tevin in charge, Kelly catches a rape case and winds up with Tyler as her partner. | Kelly/Tyler | |
| 4.7 | Circling the Limos | November 25, 2008 | A student at a private school is murdered and the school interferes with the investigation until Ryan threatens the school with criminal charges. | Richie/Tyler | |
| 4.8 | Meeting His Match | December 2, 2008 | Bryan faces a murder suspect that plays to his inner demons and forces him to rethink his decisions in life. | Bryan/Tevin | |
| 4.9 | The Mackeys Vs. Corporate America | December 9, 2008 | A.J. enlsts Tevin's help after Mackey's mother is attacked by thugs hired by a developer to force her out of her building. | Tevin/A.J./Alex | |
| 4.10 | Comings and Goings | February 3, 2009 | While Max and a returning Miguel chase after an arms dealer who has acquired a copy of the plans to the Darksaber. Joe has Max assigned to the team permanently since he's been called to one high-level meeting after another and Tevin is frequently left in charge. Bryan starts slapping people upside the head and his brother receives a job offer from another agency in Washington. | Max/Miguel | |
| 4.11 | Pirated! | February 10, 2009 | Tyler and Miguel team up with Mike after Black Sun begins hijacking cargo ships headed for Earth and stealing their contents. Miguel tells Tyler that he's getting married in the Spring. | Tyler/Miguel/Mike | Guest Star: Bam Margera as Michael Piett |
| 4.12 | Tevin's Amnesia | February 24, 2009 | Tevin loses some of his memories after an explosion. Kelly and Mike work to help him regain his lost memories while Miguel and Bryan chase after the people responsible for his injuries. | Tevin/Miguel/Mike | Guest Star: Bam Margera as Michael Piett |
| 4.13 | Commander Kelly | March 3, 2009 | Joe leaves Kelly in charge while Tyler and Richie pursue a new mob family that has ties to Tevin's neighbor Cantoni. | Tyler/Richie | |
| 4.14 | Meeting His Match 2 | March 10, 2009 | A string of murders are tied to a suspect that is immune to Bryan's Jedi mind tricks. | Bryan/Tevin | |
| 4.15 | Drunk and Disorderly | March 17, 2009 | The 501st spends Saint Patrick's Day dealing with a city full of drunk and disorderly people. | 501st Legion | |
| 4.16 | Mossad vs. Black Sun (Part 1) | March 24, 2009 | Tevin and Miguel investigate after the Director of Mossad informs Davin that a Mossad operative who was undercover in Black Sun has been found dead. | Tevin/Miguel | Introducing: Ido Mosseri as Derik Lavi |
| 4.17 | Mossad vs. Black Sun (Part 2) | March 31, 2009 | A Mossad officer joins Tevin, Miguel, and Mike in pursuit of Black Sun agents who killed a Mossad operative. | Tevin/Miguel/Mike | Guest Star: Bam Margera as Michael Piett |
| 4.18 | A Twisted Web | April 14, 2009 | Max enlists the help of Derik and Erik Jensen after a random subway mugging is tied to an L.A. gang that has ties to the Middle East. | Max/Derik/Erik | Guest Star: Ashton Kutcher as Erik Jensen |
| 4.19 | Outwitting Whitmore | April 21, 2009 | Gina Whitmore returns to wreck havoc with Bryan until he has Derik turn the tables on her. | Bryan/Derik | |
| 4.20 | Flight of the Pride | April 28, 2009 | Tyler, Richie, and Mike race to find Tevin and the Felth's Pride before Black Sun does after Tevin kills one of their agents and a bounty is put on him. | Tyler/Richie/Mike | Guest Star: Bam Margera as Michael Piett |
| 4.21 | Davin's War | May 5, 2009 | Miguel and Max investigate a politician after a murder investigation ties him to a co-ed call girl ring and a dead call girl. Meanwhile, Davin uses the case as a reason to wage war against political corruption on all levels in Albany. | Miguel/Max | |
| 4.22 | Miguel's Wedding (Part 1) | May 12, 2009 | Miguel prepares for his big day as Black Sun prepares to make its move against the Empire by attacking the wedding itself. | Guest Stars: Bam Margera as Michael Piett
Ashton Kutcher as Erik Jensen | |
| 4.23 | Miguel's Wedding (Part 2) | May 19, 2009 | As the wedding begins, Black Sun makes its move and attacks the wedding. Now, police and law enforcement from all over the world team up with Daala to begin pursuing the Black Sun agents responsible for the attack while Davin and the Rommels launch an internal investigation to find a mole within the ranks. | Guest Stars: Bam Margera as Michael Piett
Ashton Kutcher as Erik Jensen | |
| 4.24 | Miguel's Wedding (Part 3) | May 26, 2009 | With the dust settling and Black Sun agents on the run from Admiral Daala's fleet, Miguel and Anna plan a smaller ceremony in place of the big one that was planned and attacked. Meanwhile, Davin begins the prosecution of Imperial moles. | Guest Stars: Bam Margera as Michael Piett
Ashton Kutcher as Erik Jensen | |
| 4.25 | TBA | June 2, 2009 |