Prompting cries of "If Jac dies, I die," the surly surgeon was left with her life hanging in the balance after the first half of the show's two-part special on Tuesday night (December 5).
Seeming to wave goodbye to the hallowed halls of Holby for good, Jac made peace with her colleagues and decided to hand in her notice.
However, as the stairwell was plunged into darkness, the medical drama pulled its own "Who shot J.R.?" when an unseen gunman shot Jac and left her to bleed out.
Taking to Twitter, former Holby actress Chizzy Akudolu shared a special video message from Marcel to her fans, thanking them for their support.