Ep 4. If You Swear, You'll Catch No Fish

As a spy thriller set in Berlin, the show Berlin Station centers around the tensions and secrets that exist between various intelligence agencies and their operatives in the city. In season 3 episode 4, titled "If You Swear, You'll Catch No Fish," the focus is on a tense exchange between two American intelligence officers trying to work together to track down a terrorist suspect.

The episode opens with agent Valerie Edwards (played by Michelle Forbes) arriving at the CIA's Berlin station to take charge after the previous chief, Steven Frost, was recently killed in the line of duty. Valerie is immediately thrown into the deep end when her former colleague, Robert Kirsch (played by Leland Orser), arrives to inform her that a suspect they are both tracking has seemingly disappeared into thin air.

As they start to piece together the clues and potential leads, tensions between Valerie and Robert begin to rise. Valerie is convinced that someone in the CIA is giving away information to the Russians, and suspects that Robert might be the culprit. Meanwhile, Robert is convinced that Valerie is overly paranoid and forcing them to miss important clues by being too cautious.

As their investigation continues, Valerie and Robert end up going undercover and posing as a couple to infiltrate a club where they believe the suspect to be hiding out. Along the way, they encounter multiple obstacles including tricky surveillance systems and a suspicious bartender who threatens to blow their cover.

Ultimately, their mission leads them to a shoot-out with the suspect in question, and the episode ends with their uncertain fates hanging in the balance.

Overall, "If You Swear, You'll Catch No Fish" is a tense and action-packed episode that highlights the complex dynamics between the various intelligence agencies fighting for power and control in Berlin. The show does an excellent job of keeping viewers on the edge of their seats while also showcasing the intricate plotting and strategizing that goes into intelligence work. With a strong cast and compelling storylines, Berlin Station is a must-watch for fans of spy dramas.