John Krasinski starrer Jack Ryan S4 trailer is here 

Prime Video dropped the trailer of the fourth and final season of Tom Clancy's Jack Ryan on Wednesday. The six-episode season will stream on June 30, with two episodes premiering each Friday, leading up to the series finale on July 14.

The official synopsis of the series read," The fourth-and-final season of Tom Clancy's Jack Ryan finds the titular character on his most dangerous mission yet: facing an enemy both foreign and domestic. As the new CIA Acting Deputy Director, Jack Ryan is tasked with unearthing internal corruption, and in doing so, uncovers a series of suspicious black ops that could expose the vulnerability of the country. As Jack and the team investigate how deep the corruption runs, he discovers a far-worse reality—the convergence of a drug cartel with a terrorist organization—ultimately revealing a conspiracy much closer to home and testing our hero's belief in the system he has always fought to protect." 

Here is the trailer 

Apart from John Krasinski as Jack Ryan, the series also stars Wendell Pierce as James Greer, Michael Kelly as Mike November, and Betty Gabriel as CIA Acting Director Elizabeth Wright, with Abbie Cornish returning as Cathy Mueller. Joining the cast this season are Michael Peña as Domingo Chavez and Louis Ozawa as Chao Fah.