Somebody's been robbing armored cars! And they're doing it with an extremely complicated plan involving shooting a tear gas grenade through the front windshield. This technique has apparently been used by the military, which lets Oliver track down the likely culprit: Ted Gaynor, who's on The List. So everything seems pretty straightforward, except that Ted Gaynor was Diggle's commanding officer in the military. And Diggle can't imagine him being a bad guy, which sets up a battle of wills in the Arrow organization. We'll find out what happened in a couple of paragraphs. But first, the subplots!
Thea is about to turn eighteen, and she's extremely unhappy about the prospect of not being given a car. This makes her sound kind of entitled, but remember that her family has billions of dollars. She's also unhappy when she sees her mother being friendly with Malcolm Merlyn, even though Malcolm is played by John Barrowman. She decides that Moira is having an affair, and this makes her take an exciting new drug called "vertigo" and drive her new convertible into a tree. See? She got her new car after all! She also had one of the giant parties that this show specializes in, where there are sixty or so people standing around and not interacting in any way with the birthday girl.
There's also a very light storyline in which Malcolm has dinner with Tommy and Laurel, but it's just there so we can learn that Tommy's mother was shot and killed when Tommy was eight years old. And Tommy and Malcolm aren't getting along, but that's just because Malcolm took away Tommy's billions of dollars.
Okay, back to the main plot! Diggle takes a job with Ted Gaynor's company and decides the real culprit is this mean guy named Paul Knox. But after Oliver foils a robbery, it turns out that Ted was in charge of the robberies all along. The List is never wrong! Oliver drops some cryptic hints about knowing what The List is a List of, but he doesn't elaborate.
Oh, and Thea's okay. She's pretty angry at her mother, though.
An armored truck rolls down the road. The black driver objects to the rap music his non-black coworker is playing, because that subverts your expectations, you racist. They're forced to pull over to the side of the road when a black SUV pulls in front of it. And then some bad guys with guns blast some tear gas into the cab. The guards get killed and the loot in the back of the car gets taken. I'm kind of surprised a grenade launcher will so easily send a grenade through the windshield of an armored car. I guess I always thought those windshields were bulletproof. Although I don't really have any proof that grenades can't go through bulletproof glass.
Enough of them. At Castle Queen, there are much more important things to worry about: Thea complains that she's not getting a car when she turns 18. It sounds a little entitled, but I kind of think that she should get a car. These people are billionaires who live in a castle -- they can scrape up the money. And Oliver apparently got one, which he's cheerfully unrepentant about. Thea and Moira leave as Tommy arrives. The ubiquitous television news (I didn't mention that it was on in the background, because seriously: ubiquitous) reveals that there were two other armored car robberies. Tommy comments that this is why you should keep your money offshore. This is how the show imagines that billionaires talk to each other. I guess they might. I wouldn't really know.
Off to the Arrowlair, where Oliver is doing one-arm push-ups. Diggle suggests a side entrance for the Arrowlair, what with the nightclub being put in upstairs. Then they move on to the issue of the armored car. Oliver has traffic camera footage of the heist and explains that it's the same technique as a time some Marines took out a Taliban vehicle. And those Marines included Ted Gaynor, who is now head of the Blackhawk Squad Protection Group. And there's a twist: Ted was Diggle's commanding officer in the military! And there's another twist: he's on the List! Diggle insists that he's not a stickup man. He even offered Diggle a job with Blackhawk, which proves (he says) that Ted's a good guy. But Oliver says he specialized in the weapons that were used in the heist. Diggle says that maybe the List is wrong (even though last week he was all about complaining until Oliver got back to the List), and Oliver says it's never wrong. He's going to go lean on Ted Gaynor!