I'm writing a novel with several POV characters, one of which is the director of an intelligence agency. So far, the entire story is told in third person subjective. Each scene is told from the perspective of one of the POV characters.
I realized that an additional subplot consisting of several scenes is needed to tie a few things together. This subplot is a mission ordered by the director but not carried out by her. It's not realistic that she could monitor it in real time and none of the agents involved in the mission can plausibly be introduced earlier in the story. It is important that the scenes have a real-time feel to them as the main storyline is up against a ticking clock.
It feels excessive to introduce a new POV character (the agent conducting the mission) for only a few scenes, yet it would feel odd to tell that part of the story in third person objective.
What is your advice for telling this part of the story? Will it be jarring to have a few scenes told from an objective perspective? Will it be excessive to introduce a new POV character for this portion?