Second Opinion is the twentieth episode of NCIS Season 20 and the 455th episode of the entire NCIS series.
Synopsis
As NCIS works to solve the murder of a Senator's daughter and a Navy Petty officer who had a rebellious reputation and large online following, Jimmy finds himself getting competitive with an old college rival who's also working on the case.
Prologue
Act One
Parker while talking to Senator Selena Grayson.
Act Two
Act Three
Act Four
Act Five
Cast
Series Regulars
| Name | Portrayed by | Role |
|---|---|---|
| Timothy McGee | Sean Murray | Senior Agent for the NCIS Major Case Response Team. |
| Nicholas Torres | Wilmer Valderrama | Special Agent for the NCIS Major Case Response Team. |
| James Palmer | Brian Dietzen | Chief Medical Examiner for the NCIS Major Case Response Team. |
| Kasie Hines | Diona Reasonover | NCIS Forensic Specialist. |
| Jessica Knight | Katrina Law | NCIS Special Agent. |
| Donald Mallard | David McCallum | NCIS Historian. Despite being credited, McCallum doesn't appear in this episode. |
| Leon Vance | Rocky Carroll | NCIS Director. |
| Alden Parker | Gary Cole | Special Agent in Charge of the NCIS Major Case Response Team. |
Other Cast
| Name | Portrayed by | Role |
|---|---|---|
| Miles Bauer | James Snyder | Doctor. |
| Selena Grayson | Anne-Marie Johnson | Senator and also the mother of deceased Navy Petty Officer Amanda Grayson. |
| Amanda Grayson | Nikko Austen Smith | Senator Selena Grayson's daughter and a Navy Petty Officer. |
| Douglas Pritchard | Jeremy Glazer | Chief of Staff for Senator Selena Grayson. |
| Army Surplus Store Owner | John Bishop | |
| Arthur Vernon | Ryan Masson | |
| Officer at Kids Event | Frederick Lawrence | |
| Grizz | Zachary Cowan | Detective. |
| Holly Lyngos | Lexi Ainsworth | |
| Kenji | Collin Campana | |
| Floyd | Austin Powell | |
| Rylan Marsh | Mark Ciarrocchi |