“Deal with the Devil” isn’t just another case-of-the-week for NCIS — it’s a collision of justice and family for Alden Parker. Season 23, Episode 19 sees Nancy Travis reprise her role as Harriet Parker, adding a personal dimension to an already tense storyline.
The episode hinges on a secret immunity deal that threatens to undermine the investigation, potentially allowing a suspect to escape consequences. Parker refuses to let the case slip away, but his resolve is tested when Harriet enters the scene.
Described once again as his estranged sister, Harriet’s return highlights the unresolved nature of their relationship. Whatever progress they may have made in the past, it clearly wasn’t enough to mend years of conflict.
With standout guest appearances becoming a hallmark of the season — including LL Cool J and Emily Wickersham — this episode continues the trend, offering both emotional depth and procedural intrigue in equal measure.