Should I Marry a Murderer?

In 2020, pathologist Caroline Muirhead's fiancé, Scottish farmer Alexander 'Sandy' McKellar, confessed to her that he and his twin brother Robert had killed cyclist Tony Parsons in a 2017 hit-and-run on the A82 near Bridge of Orchy and buried the body on the Auch Estate.

• 

  01 Part 1

  50m

  In 2020, a Glasgow pathologist meets a Highland gamekeeper who seems perfect on paper. They're soon engaged — then a confession changes everything.

  2026-04-29 7.0
• 

  02 Part 2

  44m

  As Caroline's actions give police a new lead in a cold case, she enters a terrifying double life with the McKellars — and hopes Sandy still trusts her.

  2026-04-29 7.2
• 

  03 Part 3

  56m

  Torn between doing the right thing and protecting the man she can't walk away from, Caroline spirals as she desperately tries to avoid the witness stand.

  2026-04-29 7.3

Who is in it

• C
  Caroline Muirhead
  Self
• S
  Sandy McKellar
  Self (archive footage)
• S
  Stephen Muirhead
  Self – Caroline's Father
• M
  Margaret Muirhead
  Self – Caroline's Mother
• N
  Ninon Noiret
  Caroline Muirhead
• J
  James Crouch
  Sandy McKellar
• R
  Robert McKellar
  Self (archive footage)
• T
  Tony Parsons
  Self (archive footage)