Well, that didn't take long at all.

By the end of Hawaii Five-0 Season 10 Episode 3, Quinn Liu became a member of Five-0 after hanging out with McGarrett for a day.

Danny wasn't around so someone had to hang out with him.

What are the early returns on Quinn?

So far, I like her. I still don't think she exactly serves a unique function on FIve-0, but then Jerry didn't either. So I can't hold that against her.

As an aside, the fact that Grover and Quinn were joking about Adam reminding them of Jerry and his conspiracy theories make me think Jerry will be back in a recurring role, maybe sooner than we think.

Let's hope.

Related: Hawaii Five-0 Season 10 Episode 2 Review: Knocked Flat By the Wind

The fact that Quinn makes McGarrett seem positively chatty in comparison is a plus.

She gave Steve crap so much that it was like Danny was still there. Whereas Danny comes off as someone's kvetching grandfather, Quinn offers a much harder-edged sarcasm.

The story about the Kurdish policeman she had trained showed off her softer side though.

Hopefully, we can find out more about Quinn's other facets without it interfering with other characters' stories too much.

Often, introducing a new character results in others getting back-burnered, with little growth throughout a season.

Quinn was effective in getting under Cullen's skin, interrupting and eating a good portion of his breakfast while McGarrett listened.

At least it was made clear that Quinn was on a day off while she and Steve tailed Cullen around town. Blowing through that stoplight blew their cover right off the bat, as they would come to find out.

Tailing a suspect in a shiny, red pickup truck wasn't the most inauspicious thing to do either. A beater from the motor pool would have been a better choice.

But that's McGarrett. Go big or go home.

They abandoned Cullen pretty quickly to follow the man Cullen was talking to near the airport, rendering eavesdropping impossible.

You would have thought the men digging up the barrels stuffed with cash would have been suspicious enough to call for backup and stop them then.

Had Five-0 stopped the men then, Quinn wouldn't have gotten busted by CID later. It can't be a coincidence that large sums of cash were found in her apartment after an anonymous tip, can it?

But McGarrett decided to keep tailing them, which was impossible because his truck's tire had been punctured. So that stakeout was a big bust. 

But Steve went with his gut once again in making the offer for Quinn to join Five-0. He was certainly right that the Army would let her go based on her recent track record of insubordination.

Quinn was a perfect resident for his Island of Misfit Toys.

Related: Watch Hawaii Five-0 Online: Season 10 Episode 2

Too bad that touching moment got spoiled by her trumped-up arrest. At least McGarrett was able to undo that almost instantly.

Cullen never rang true as a criminal mastermind. It turned out he was expendable middle-management at best. Blowing him up was good shock value though.

Steve and Quinn's excellent adventure left Grover working with the junior varsity (sorry, Adam).

An opening scene that left one yearning for the glory days of Duran Duran introduced viewers to the final moments of Flight 912.

Then an old mystery which had only grown over time led to a new mystery, how the body of a diver ended up among the 36-year-old remains of the passengers.

Things got curiouser and curiouser when Noelani revealed that the diver had been killed with an underwater shark gun, likely by his diving partner.

Adding to the wackiness of the crime was all the conspiracy theories swirling around the downing of Flight 912, with the favorite the military accidentally shooting it down as part of the Strategic Defense Initiative ("Star Wars") program.

Prominent among all these theories was that the truth would never come out.

So the question became what was the dead diver and his killer after aboard a plane that had been on the ocean floor for three decades?

But of course it wasn't the deep state trying to hide the truth but good old-fashioned greed at work.

The black box was found on the recovered plane, but several seats were missing. That meant figuring out what had been stashed in first class.

What a surprise to find out that the leading conspiracy nut was also the brother of a man who died on the plane was the loudest advocate for finding out what happened to it.

That brother had been in New York during a major jewelry heist, returning to Hawaii quickly after that.

The whole situation was the result of a man paying divers to retrieve several million dollars worth of jewelry.

Things came together once Grover and company figured out who and why.

A highlight was Tani's battle with the killer, Sara Brown.

It could have been over when Tani winged Sara, who then fell into the ocean. 

Instead, Sara fired up through the pier and Tani dove into battle her underwater. 

You'd think there were be more of these types of fights on an island surrounded by water. But this was an enjoyable one, with Tani getting sliced with a knife even after she had gotten rid of Sara's gun.

Then she even had to save Sara with some CPR.

Related: Get CBS All Access via Amazon Channels for Hit Shows, Exclusive Originals & Live TV!

With Cullen gone, this leaves more unanswered questions. Who was he working for, and what are they planning? Is Five-0 the target or are they just in the way?

To catch up on Quinn, watch Hawaii Five-0 online.

Were you surprised Quinn was brought on board so soon?

Who is behind Cullen?

How soon did you determine who was behind the raid on the plane?

Comment below.

---------------------------------------------

Editor's Note: Our system got updated! Now, you'll be able to scroll through many articles at once. That required a bit of a change to the comments, though, and now you have to click the blue "comments" bar at the bottom of an article to access them. 

There are also two segments to comments now. You can either comment using Facebook or Disqus. Either way, you can SEE both types of comments. We hope that will be more inclusive of our community at large and that the conversations will grow as a result.

Dale McGarrigle is a staff writer for TV Fanatic. Follow him on X.