(Also, there were some crossover shenanigans, but well get to that later).
This entire first scene alone was a great indication of how muchSupergirlhas improved this season.
It effortlessly juggles the dinners many competing agendas.

Credit: Bettina Strauss/The CW
Mon-El, who definitely has feelings for Kara, tries to score points by sucking up to Eliza.
However, Lillian lies and says she isnt up to anything nefarious.
While Lillian lies to her daughter, Cyborg Superman moves forward with CADMUS dastardly plan.

He shows up at the alien speakeasy and unleashes Project Medusa, a deadly virus that kills only aliens.
Mon-El is quarantined in a cell and Kara and Jonn stay at the DEO to avoid catching the virus.
Instead of coming clean, Mon-El denies it, and thats when he starts having trouble breathing.
How can the parents she loves create something so horrible, and what does that say about their legacy?
Thankfully, Jonn is there to remind hershesher parents legacy.
Eliza and Alex team up to find a cure for the virus.
While her response isnt entirely surprising, Elizas accepting and loving response to Alexs admission was incredibly heartwarming.
Unfortunately, Maggie, who showed with the NCPD, is injured in the fight.
Supergirl decides to confront Lena about her mother, but Lena doesnt respond too kindly.
Jonn, who told Kara about this White Martian problem, insists on following her out into battle.
If hes going to die, he wants to die as a Green Martian.
Supergirl and Martian Manhunter fly out to confront the Luthors.
If I had one complaint about this episode, its this tidy resolution of Jonns problem.
Later that night, Maggie shows up at Alexs apartment with a pizza.
The show has been building to this moment for quite some time, and it feels completely earned.
This story will pick up in tomorrow nightsThe Flash.
Medusa was a strong conclusion to the first half ofSupergirls second season.
Im excited to see what comes next.
Wall of Weird: