7.1
/10
Major Mark Sealy is a fictional character portrayed by William Ash in the TV series Silent Witness.
In the first episode they appeared in, titled The Greater Good: Part 1 (season 23), they were 43 years old.
They appear in 2 episodes out of a total of 247 aired so far

Major Mark Sealy

by William Ash

character

Episodes2

  • 8
    /10

    The Greater Good: Part 1
    episode S23.E9 february 2020
    Thomas investigates the case of John Sealy, a soldier who died during a military training exercise involving exposure to CS gas. It appears John died from an aneurism, but when Thomas discovers the trace of a possible nerve agent in his system, the family are desperate for answers. Was a chemical weapon involved or is there a more innocent explanation?
  • 8.4
    /10

    The Greater Good: Part 2
    episode S23.E10 february 2020
    It appears John died from an aneurism, but when Thomas discovers the trace of a possible nerve agent in his system, the family are desperate for answers. Was a chemical weapon involved or is there a more innocent explanation?