This week’s Supergirl features some farewells (bye Cat and Clark) and we say hello to new characters (hi Snapper Carr and Mon-El).

Superhero Team-Up

Kara is on a high with her cousin Clark in town as the two are zipping around National City helping the fire department stop a fire, stop a robbery and capture a runaway alien.

The Superman/Supergirl team up further the rift between Hank and Clark and also unintentionally creates jealousy in Alex.

Alex is hoping to have sister time with Kara but doesn’t get it as Kara invites Clark to hang out too.

When Clark arrives, he pulls Kara aside to tell her that as much as he has loved his time with her, it is time for him to return to Metropolis and to Lois. Before more can be discussed, a news report alerts them to a suicide jumper and the two decide to do one more team-up.

When Superman and Supergirl arrive, they see it is John Corben who know goes by the name Metallo.

We saw Metallo being created in Cadmus Labs in the last episode. The main doctor, whom I am calling Dr. Mary Alice until we learn her name wants to unleash Metallo but a lab lackey thinks he isn’t ready.

Back to the Georgia Viaduct (where the battle was filmed in Vancouver) where the Kryptonians are battling Metallo who takes them out with his Kryptonite heart. When Supergirl goes down, Superman knocks Metallo away and brings Kara back to the DEO.

While the battle was going on, Cadmus interrupts TV broadcasts to claim responsibility and states their mission is to stop the alien menace on Earth, people like Clark and Kara, and protect the Earth by any means possible.

When Superman brings back Supergirl to the DEO, he confronts Hank about where Metallo Kryptonite since he claimed that the DEO is the only place that had the deadly rock. Hank and Alex have to admit that four months ago a shipment of Kryptonite was hijacked and stolen.

The DEO believe there is a mole involved as to why the shipment was stolen.

There is some good news though, during the battle, Superman managed to get a piece of Metallo’s exoskeleton so he and Hank go to the Fortress of Solitude to see what they can find.

Before they take off, Hank tasks Winn to develop a suit to protect Superman/Supergirl from Metallo’s Kryptonite heart. Winn is super excited to build Superman’s new suit. When Winn completes it and Superman is complimentary about it, Winn tears up.

At the Fortress of Solitude, Superman and Hank try and resolve their differences. Superman tells Hank they could have been friends and colleagues if it wasn’t for the Kryptonite. Hank tells Superman that he held on to the Kryptonite to defend Earth as he was caught unprepared on Mars and lost his home as a result. Using Kalex, the two discover that Metallo’s exoskeleton is made of Promethium.

Meanwhile at Cadmus, the lab lackey tells Dr. Mary Alice that Metallo went out too soon but she disagrees and is ready for Phase Two and the lab lackey is dragged away to become Metallo II.

Thanks to the Promethium tip, Superman and Supergirl find Metallo in an industrial area of town. When the Super Cousins battle Metallo, they realize that it was a distraction as Metallo II was in Metropolis destroying Krypton Park.

After a bit of a personal set back at CatCo (more on that later), Kara tells Alex that she is thinking of moving to Metropolis to be with Clark. Kara thinks that moving away will stop Cadmus and their plans. Also, Kara wants to be around someone that understands her and also wants to learn more from Clark.

Alex has reached her breaking point and tells Kara how she felt ignored and cast aside since Clark arrived. Alex reminds Kara how it was her that protected her secret and kept her safe while Clark abandoned her with her and her family.

Back at the DEO, Alex gets an idea from Winn on how they can discover the DEO mole. Using a Geiger counter, the find Kryptonite radiation at an Agent McGill.

To test her mole theory, Alex orders McGill to move a shipment of Kryptonite to Las Vegas for safe keeping. Alex then catches McGill moving it elsewhere.

However, Dr. Mary Alice is there and taunts Alex about her dad and saying how they could have worked together. Alex refuses the offer and manages to evade her captors thanks to an assist from Supergirl, who apologizes for taking Alex for granted.

Team Supergirl figure out the best way to defeat both Metallo’s is to do a team up as Cadmus believes the Super Cousins have given up and retreated back to their respective cities.

So in National City it is Supergirl (wearing Winn’s modified suit) and Alex (in an exoskeleton suit) versus Metallo and in Metropolis it is Superman (also wearing Winn’s modified suit) and Martian Manhunter versus Metallo II. After a back and forth battle in both cities, the foursome take down both Metallos by hitting them in their Krytonite hearts. After Metallo goes down, Supergirl looks into his eyes and proclaims that she is coming after Cadmus. Dr. Mary Alice takes this warning as a declaration of war.

Not Quite The Front Page

Kara is excited to start her first day as a reporter at CatCo. Cat introduces Kara to Snapper Carr (Ian Gomez), one of her editors and an investigative journalist. However, Snapper doesn’t recognize Cat as his new stringer because 1) he didn’t hire her and 2) is offended that Kara chose the reporter job versus earning it via going to journalism school (I kind of agree with Snapper her. You don’t all of sudden decide to be a reporter and expect to be one immediately with no training. Not everything falls in your lap Kara). When Kara goes to Cat to complain and wants her to say something to Snapper, Cat tells Kara that she needs to learn to stand up for herself.

Kara takes Cat’s advice and presents Snapper with the article she wrote about Cadmus and the Metallo battle. At first Snapper refuses but eventually peruses. However, Snapper still refuses to hire her but when Kara threatens to take the story elsewhere that he decides to take her under his wings. Snapper keeps on calling her pony tale while Kara weakly tries to call him a jerk.

Farewell Cat Grant

In the saddest part of the episode, Cat announces to Kara that she is taking a leave of absence at CatCo as she has felt for a long time that she is just swimming in circles and wants to take a dive and try something new. The two share a farewall hug.

Supergirl also says good bye to Cat and they two share another nice moment. It is great that Kara got a chance to say what Cat means to her for both of her alter egos. Also, it was great that throughout the episode Cat actually pronounced her name correctly.

With Cat on leave (but we know will occasionally come back), James has take on the role of interim CEO of CatCO.

Farewell Superman

With the Metallo threat over, it is time for Superman to return to Metropolis. As a parting gift, Hank gifts Clark with the Kryptonite to do as he sees fit. Kara gives a Kryptonian farewell that means their adventures are to be continued.

Superman returns to Metropolis and changes into Clark. Immediately upon landing, Clark texts Kara to say he misses her already and she misses him too. Then Mr. White calls Clark demanding his article.

Stranger from Another Planet

We all know that the stranger in the pod is called Mon-El but to the DEO, he is a stranger that is draining the electricity from the DEO and using it to regenerate his body. Kara sits by his bedside and tells him she knows what it is like to be a newcomer to Earth and that she is here to help him. This is when Mon-El wakes up and starts to choke Kara.

A solid episode but I am sad to see Cat leave and also sad to see Clark/Superman leave too. Tyler Hoechlin was just so great in the role that I hope we see him again.