: The duo eventually finds ways to bring Sherlock and Joan back into the NYPD fold despite the department's initial resistance. Where to Watch

: A new series regular who becomes a central figure throughout the season's overarching mystery.

Season 4 of the CBS series focuses on the complex reintroduction of Sherlock Holmes' estranged father, Morland Holmes (played by John Noble), and the fallout of Sherlock's relapse at the end of the previous season. Key Narrative Arcs

: Struggles with his sobriety while dealing with his father's unwanted interference in his life.

: Continues to be Sherlock's steadying force and a highly capable detective in her own right, maintaining an "unbreakable friendship" with Sherlock.

: Notable episodes include investigations into high-stakes corporate espionage, a double murder linked to a comic book character, and the "Art Imitates Art" case where a murder matches a scene in a college play. Cast and Characters

: Sherlock and Joan Watson must navigate an uncertain professional future after being fired from their consultancy roles with the NYPD. Much of the early season deals with them proving their worth to regain their positions.

Season 4 is available for streaming on platforms such as Hulu and Disney+ with a subscription, or for purchase through retailers like Fandango at Home. Elementary recap: All In and Art Imitates Art