Minor spoilers ahead

The intro scene to the latest episode of S.H.I.E.L.D. entitled “Eye Spy” was ominous and darker in tone. There was no dialogue. Men in suits wearing bright red masks and carrying suitcases full of diamonds are working their way toward the subway station. But someone is following them, watching their every move.

On the subway, the lights go out. When they come back on, the men are lying on the floor unconscious (probably because they’re dead) and their suitcases are gone.

The episode becomes a Sherlock Holmes-type mystery case that S.H.I.E.L.D. is going to solve. And the findings make the episode another strong entry to the young series, and it gives a little more personal insight to some characters, namely Agent Coulson.

S.H.I.E.L.D. surveillance reveals that the mystery person on the subway is Akela Amador, who, as it turns out, is a former agent herself. In an intriguing (albeit unoriginal) twist, she was trained by none other than Coulson. When he discovers what she’s doing, Coulson makes it his personal mission to put a stop to it.

In fact, Coulson works off the book without alerting headquarters, a seemingly suspicious move. A lot of his actions seem to leave his team in disarray as his ability to lead becomes shaky and questionable at best. While on a sting mission, Fitz, Simmons and Skye, who clearly aren’t ready to be in the field, get caught while Coulson and Agent Ward are trying to gather intel.

During a pursuit, Agent May feels the need to take matters in her hands and follow Amador to a hotel room. This leads to the coolest fight scene in the show yet as May and Amador go at it. It becomes quite clear why May has her reputation. Her trash-talking line “You should have stayed in bed” was pure awesome.

After detaining Amador, Coulson discovers a truth about her actions. She was being manipulated with cool, new tech that even S.H.I.E.L.D., the supposedly advanced agency it is, wasn’t even aware of. So he decides to use this tech against the unknown manipulators, which helps S.H.I.E.L.D. figure out what they’re after. Coulson and Skye come up with a plan to use the tech to their advantage without revealing that Amador is no longer the one being manipulated. This leads to some interesting, comical interactions Ward has with some people he comes across (I’ll save the surprise here, suffice to say that, through four episodes, this is the most entertaining scene Ward has been in).

Skye, who still isn’t technically an agent, sympathizes with Coulson. After all, Skye expresses she feels Coulson’s heart is in the right place regarding Amador after he already proved he’s the only one who cared about Skye. They have a touchy, personal dialogue exchange about people getting second chances.

In the end, they catch the bad guy, only to discover he, too, was being manipulated. As with previous episodes, writer Joss Whedon leaves the audience knowing something bigger is at play and teases more will be revealed in later episodes.