Tension ramps up between the Klingons and the Federation as the midseason finale approaches.

Thats partly because the Klingons reappeared.

In prior installments, thrilling Discovery stories have offset inert Klingon plots.

Si Vis Pacem, Para Bellum

Credit: Jan Thijs/CBS

Fine but that doesnt mean it makes for great TV.

By modifying its electromagnetic frequency, Starfleet hopes to use the structure to detect Klingon vessels cloaked in invisibility.

Predictably, things dont go as planned.

Initially, that doesnt seem like itll be much of a problem.

Saru laments that establishing a vocabulary with the Pahvans has been difficult, but remains optimistic.

The whole thing feels like a cosmic campout.

But while Tyler and Burnham sleep, the planets noise overcomes Saru, who leaves their shelter.

The Pahvans permeate him, and he has a strange dreamlike experience.

Sarus been co-opted by the aliens and has determined the trio isnt leaving the planet.

Saru urges them not to, because they could invite Klingon retribution, but Burnham convinces them otherwise.

Once theyre back aboard Discovery, Burnham talks to Saru, who is no longer under Pahvan influence.

The overwhelming relief was irresistible for him.

As Kols ship beams into the planets orbit, the credits roll.

With the midseason finale due next week, plenty hangs in the balance.

In the short term, how will Discovery fare in battle with Kol?