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The Best Episodes of Silent Witness Season 21

Every episode of Silent Witness Season 21 ranked from best to worst. Discover the Best Episodes of Silent Witness Season 21!

Binge this in 10h 0m•Peaking at 8.2/10

A team of exceptional forensic pathologists and scientists investigate heinous crimes and use their skills to catch the people responsible.

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Episode Rankings

  1. #1 Fan Favorite
    Silent Witness Season 21 Episode 1 - Moment of Surrender (1)
    7.4/10(277 votes)

    #1 - Moment of Surrender (1)

    S21:E1

    Nikki struggles to come to terms with life back home and seeks out fellow pathologist Sally Vaughan for support, only to learn she is nowhere to be found. National Crime Agency investigator Guy Bernhardt asks Nikki to help him by employing pathologist David Cannon, the chief suspect in Sally's disappearance. As Jack, Clarissa and Thomas share concerns about Nikki's wellbeing, a body found in a reservoir is linked to a murder case from 16 years previously. Return of the crime drama, starring Emilia Fox, with Julian Rhind-Tutt and Alex Macqueen.

    Director:Unknown
    Writer:Unknown

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  2. Silent Witness Season 21 Episode 2 - Moment of Surrender (2)
    7.3/10(249 votes)

    #2 - Moment of Surrender (2)

    S21:E2

    Nikki's suspicions about David Cannon are roused further when she discovers blood in the boot of his car an with Thomas's support she takes samples to process. Does it belong to Sally Vaughn? Meanwhile, the uncovering of the body from the 16-year-old murder shines the spotlight on three people who went to the same school. Emilia Fox stars, with Julian Rhind-Tutt and Alex Macqueen.

    Director:Unknown
    Writer:Unknown

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  3. Silent Witness Season 21 Episode 3 - Duty of Candour (1)
    7.4/10(248 votes)

    #3 - Duty of Candour (1)

    S21:E3

    A series of tragic events are linked to the hacking of a hospital database.

    Director:Unknown
    Writer:Unknown

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  4. Silent Witness Season 21 Episode 4 - Duty of Candour (2)
    7.4/10(234 votes)

    #4 - Duty of Candour (2)

    S21:E4

    The team wonder if the hack is the only danger as they come under threat.

    Director:Unknown
    Writer:Unknown

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  5. Silent Witness Season 21 Episode 5 - A Special Relationship (1)
    7.7/10(288 votes)

    #5 - A Special Relationship (1)

    S21:E5

    A US diplomat is shot dead in central London, forcing the team to work closely with the embassy and the FBI.

    Director:Unknown
    Writer:Unknown

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  6. Silent Witness Season 21 Episode 6 - A Special Relationship (2)
    7.7/10(278 votes)

    #6 - A Special Relationship (2)

    S21:E6

    Nikki is still in shock as the team arrive at Matt's residence but insists on working at the Lyell, determined to help. When analysing crime scene photos and the positions of the victims' bodies, Nikki realises there is a pattern. Together, the team uncover a secret that has been held by those at the very top of the US government.

    Director:Unknown
    Writer:Unknown

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    The 20 BEST Episodes of Silent Witness

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  7. Silent Witness Season 21 Episode 7 - One Day (1)
    7.8/10(305 votes)

    #7 - One Day (1)

    S21:E7

    While two care home staff are chasing Kevin McDowd, a young man with learning disabilities and sociopathic tendencies, Nikki and Jack examine a fatal road accident where the deceased is Kevin McDowd's mother. The investigation led by police sergeant Button should be straightforward, but the forensic evidence suggests foul play.

    Director:Unknown
    Writer:Unknown

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  8. Silent Witness Season 21 Episode 8 - One Day (2)
    8.2/10(293 votes)

    #8 - One Day (2)

    S21:E8

    The team are determined to uncover the truth about unexplained deaths of patients at a care home. They are desperate to rescue Serena and return her to safety. Unbeknownst to her colleagues in the Lyell Centre, Clarissa allows herself to be admitted to the care home in order to investigate. Her determination to find out what happened at the care home leads her to uncover a shocking truth, but puts her life in danger.

    Director:Unknown
    Writer:Unknown

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  9. Silent Witness Season 21 Episode 9 - Family (1)
    7.7/10(264 votes)

    #9 - Family (1)

    S21:E9

    Nikki, Jack, Thomas and Clarissa are just settling down for their respective festive celebrations when they are interrupted by a call-out to a tragedy at a family home.

    Director:Unknown
    Writer:Unknown

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  10. Silent Witness Season 21 Episode 10 - Family (2)
    7.5/10(245 votes)

    #10 - Family (2)

    S21:E10

    As the truth behind the McMorris family is revealed, the team is brought together by the conclusion of a shocking Christmas family tragedy. Reuniting with their respective families, Nikki finds her secret Santa gift is a visit from a loved one.

    Director:Unknown
    Writer:Unknown

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Season 21 Ratings Summary

"Moment of Surrender (1)" is the best rated episode of "Silent Witness" season 21. It scored 7.4/10 based on 277 votes. Directed by Unknown and written by Unknown, it aired on 1/8/2018. This episode is rated 0.1 points higher than the second-best, "Moment of Surrender (2)".