Reviewers from Rotten Tomatoes described the season as both "brilliant and maddening," noting its ability to balance dark humor with credible drama. Many felt it successfully set the series on track for its final conclusion in Season 7.

: Kelly McPhee (Maura Tierney) returns and faces a harrowing battle with cancer, a storyline that mirrored the actress's real-life health struggle at the time. Key Season Themes

: The season opens with Tommy Gavin (played by Denis Leary ) clinging to life after being shot by his Uncle Teddy. His recovery is marked by haunting visions and a brief "otherworldly" experience that forces him to confront his mortality.