What is this blade doing here?

A sword's tip on the back, a threatening knife on the throat, a hostage situation, a power play.

The kind of blade is not important. The important is that the whumpee (and maybe loved one too) is not at all confortable with that thing so close to their skin.

TV Shows
Carnival Row


 * 1x01: Rycroft Philostrate (Orlando Bloom) is at bed when Vignette appears and puts a blade on his neck, demanding an explanation for his actions on the past.

Merlin


 * 1x02: Very brief. Merlin (Colin Morgan) is inspecting a suspicious shield, of one the knights participating in the tournament, when it's owner shows up and puts the tip of the sword on Merlin's chest.

Shadowhunters


 * 1x03: Simon Lewis (Alberto Rosende) is taken hostage by vampires, and when the shadowhunters are almost getting to him, Rafael holds Simon at bladepoint, to make Clary and the others do as he says.

The Alienist


 * 2x02: While investigating the conexion between a gangster and a missing baby, John Moore (Luke Evans) is caught by surprise by said gangster, manhandled, a knife on his throat and a wall against his back.
 * 2x07/2x08: John fights with the criminal, but she manages to grab a hidden knife and puts on his throat, using him as a hostage to get answers. He gets a cut from this.

Movies
Mortal Engines (2018)


 * Hester Shaw, angry with Tom Natsworthy (Robert Sheehan), point his own knife to his throat, so he would stop following her.