The query could refer to a few different television series, but it most likely refers to Marvel's The Punisher , as "Gunner" is the official title of that specific episode.
Agent Rawlins and his "Orange" team use drone surveillance to track Frank and Gunner. A major firefight ensues in the woods, where Frank and Gunner must fend off highly trained soldiers.
Features a segment with Gunner the therapy dog .
Titled " Gunner ," this episode follows Frank Castle and Micro as they track down a former soldier and reluctant witness named Gunner Henderson . The episode is known for its intense woods-based combat sequences and for revealing that Gunner is being hunted by the same conspiracy targeting Frank.
In this episode, Frank Castle (The Punisher) and Micro (David Lieberman) work together to locate , a former member of the Cerberus Squad who filmed the illegal execution of Ahmad Zubair in Afghanistan.
I am providing a full summary for the episode below, as it is the direct match for the title "Gunner." [S1E5] The Punisher: "Gunner" – Episode Summary
Gunner (episode) | Marvel Cinematic Universe Wiki | Fandom
While titled "Part Five," this episode prominently features the brutal experiences of B-17 gunners during a disastrous mission over Munster.