The Best Episodes Written By Geoff Johns

A man named Sylvester Pemberton tracks down Chloe and tells her he knows about her team of superheroes and needs their help. However, before he can explain who he is, he is attacked and killed by Icicle. Clark and Chloe's investigation leads Clark to the former headquarters of the Justice Society of America where he meets up with Nelson AKA Dr. Fate, Carter Hall AKA Hawkman and Courtney AKA Star Girl. Courtney pleads with Hawkman and Dr. Fate to help her catch the killer that is targeting their group but they are reluctant to resume their duties as superheroes. Clark, John Jones, Green Arrow and Chloe team up to help the JSA stop Icicle before he murders another member of the group. Meanwhile, Lois receives a package from a mysterious agency called Checkmate, run by Amanda Waller.

The Persuader attacks Clark; Chloe, as Brainiac, tells Davis he is Doomsday and that he was created to destroy the "other Kryptonian" and the world.

After covering from a near-fatal drug overdose, Oliver begins hallucinating people from his past. Believing he's a liability, Oliver gives the information he has on Cyrus Gold to Quentin... which results in the deaths of several police officers. Meanwhile, Brother Blood captures Roy and uses him as a test subject for his new serum. In the past on the island, Ivo gives Oliver an impossible choice to make.

After everything that happened with the VRA, Lois tells Clark it’s best to make “Clark Kent” forgettable and awkward so people don’t suspect he’s The Blur. However, the two are stunned when a fame-hungry superhero from the future, Booster Gold, sweeps into town and begins making saves and posing for press ops, completely winning over the city of Metropolis. Booster begins his campaign to take The Blur’s place as the “World’s Greatest Superhero” and tries to charm Lois into writing a story about him, but she’s not having his antics and begins her own campaign for The Blur. During one of Booster’s saves, an alien weapon in the form of a scarab falls from a truck and fuses itself to a boy named Jaime Reyes, turning him into the Blue Beetle. Unfortunately, Jaime is unable to control the suit and Blue Beetle starts attacking Metropolis.

When Oliver and his team destroy Slade's centrifuge, he attacks them as Deathstroke to get what he needs to find a replacement. Meanwhile, Laurel ponders what to do with Slade's information, and Oliver tries to convince Thea to help him protect their finances from Isabel.

When a superhumanly strong thief robs a Queen Consolidated warehouse, Central City police scientist Barry Allen comes to Starling City to investigate the case. However, despite his close working relationship with Felicity, Oliver suspects that there's more to the young scientist than meets the eye. Meanwhile, Sin asks Roy to help investigate the disappearance of a friend. In the past, Oliver, Shado, and Sara try to get Slade to the submarine so they can use the serum to save his life.

Oliver and Diggle learn that Deadshot is still alive and his next target is Malcom. Malcom invites Tommy to attend a benefit honoring Malcom for his work with Starling City but Tommy refuses to attend. Oliver encourages his friend to mend his relationship with his father while he can. Meanwhile, Oliver struggles to balance his new relationship with McKenna and his duties as Arrow.

Titan Force Five faces extinction by their own thankless government; a squad of marines attempts to hunt down the evil Gibbs.

Gibbs targets an energy plant on Neptune; Titan Maximum goes toe-to-toe with an alien ice monster in a winter wonderland.

The Mars-Titan “Peace Feast” is interrupted by a monstrous threat; Sasha rekindles a bitter rivalry with an utter d-bag.

Titan Force Five races to stop the annihilation of an entire planet of grandparents; Gibbs’ master plan will shock your pants completely off.

Titan Force Five and Gibbs have their ultimate showdown with the fate of Mercury in the balance; terrible violence is committed against a groin.

Courtney and the JSA find themselves in the fight of their lives against their biggest threat yet.

Oliver encounters a mysterious woman, Helena Bertinelli, daughter of mob boss Frank Bertinelli, who he can finally be himself with, but he soon comes to realize she's hiding dangerous secrets of her own. Helena is on her own personal mission of vengeance and Oliver is caught in the middle. Meanwhile, Tommy is blindsided by an unfortunate turn of events and turns to Laurel for support.

Gar brings Rachel home to his “family” – a group of misfit medical experiments we’ll come to know as The Doom Patrol (including Robotman, Negative Man and Elastigirl).

The Flash battles Captain Cold after the villain is involved in a robbery and plots to steal the Kahndaq Dynasty Diamond.

While Barry strives to become fast enough to defeat Reverse-Flash, Captain Cold returns to Central City with a partner and takes Caitlin hostage to force a confrontation with the Flash.

As the Injustice Society of America come closer to accomplishing their mission, Courtney and the JSA face off against Icicle and the villains of the ISA.

Titan Force Five’s monster investigation leads them to the hillbilly-infested dwarf planet Eris; Jodi collides with an old flame.

The team travels to the Boca Raton of the future, the planet Mercury; Jodi’s origin story leads her into the shadowy world of competitive arm wrestling.

Titan Force Five becomes personae non gratae on the planet Mercury; Troy Hammerschmiddtt makes an unwelcome guest appearance.

After a recent experience renews Courtney's confidence, she sets out to make amends with those around her. Jakeem puts his foot down after Mike shares his latest plan.

Rachel and Kory travel to the convent where Rachel was raised, while Dick compares his own orphan experience to Rachel’s. Meanwhile, Rachel befriends Gar Logan.

Barry changes into the Flash when six gunmen storm a university event honoring a scientist, but his heroics don't match up to his expectations. Meanwhile, Iris becomes even more intrigued by the "red streak."

Barry discovers his powers and puts them to the test, only when he finds its no longer a test but the real thing when he encounters a certain someone.