Supergirl

Kara is surprised to find that CatCo has a new owner, who has brought in a star reporter. And J'onn J'onzz receives an unexpected visitor.

Supergirl, Alex and Brainiac thwart an alien attack, while William investigates Kara. Meanwhile, J'onn J'onzz and Kelly use Obsidian tech to solve a problem.

Kara attempts to mend her relationship with Lena. J'onn J'onzz takes a deep dive into his memories while Kelly tries to help an old friend.

Kara's investigation into William's "criminal" activities leads her to learning that he's not who she thinks. Meanwhile, the conflict between Malefic and J'onn grows.

Kara (MELISSA BENOIST) and William team up on an investigation that exposes a terrorist plot, while Kelly and Alex (CHYLER LEIGH) celebrate an anniversary, but Alex is in jeopardy.

Andrea (JULIE GONZALO) and Lena (KATIE McGRATH) think back on their tumultuous past, while Supergirl utilizes a new villain at the DEO.

While tangling with Leviathan, Supergirl finally learns the truth about Lena. And J'onn J'onnz makes a discovery about his brother's whereabouts.

Supergirl's struggle against Leviathan reaches a boiling point as she faces off against Rama Khan (MITCH PILEGGI).

In the first part of the five-part crossover, The Monitor sends Harbinger to gather the world's greatest heroes in preparation for the impending Crisis.

The subsequent complications from the Crisis leave Supergirl to face a chaotic threat.

As Supergirl tries to thwart a Toyman copycat, Winn Schott (guest star JEREMY JORDAN) returns from the future. Series star David Harewood directs.

After Alex sets out to find evidence against Lex, Brainy must decide between helping his friend or continuing to secretly work for Lex. Meanwhile, Supergirl helps Winn face his greatest fear.

In the 100th episode, Mxyzptlk returns with a proposition for Kara – what if she could go back in time and tell Lena her secret before Lex did, would things turn out different?

Lex tasks Supergirl with protecting Andrea from an anti-tech extremist, while Lena moves forward with Non Nocere, with Lex's help.

When Dreamer is targeted for being a transgender superhero, Supergirl and Brainy stand by her side. Meanwhile, Alex, Kelly & J'onn attempt a virtual reality rescue.

While Kara deals with difficult news, Alex uses a pair of Obsidian contact lenses to visit a virtual National City where she takes on a whole new persona.

Lex proceeds to lay an intricate plan to bring Lena closer to him, defeat Leviathan's latest attack, and pit Supergirl and team against Leviathan. Melissa Benoist directs.

While Lena discovers the consequences of Project Non Nocere, Supergirl and the team go head to head against Rama Khan and Leviathan.

In the season five finale, Supergirl must work with the one person she never thought she'd trust again – Lena – in order to stop Lex and Leviathan.