![Supergirl Season 2 Episode 18 Supergirl Season 2 Episode 18](https://image.tmdb.org/t/p/w185/qcp7tBPNxW5NtyoLlDXQxIRwkKw.jpg)
Supergirl Season 2 Episode 18
Lena’s ex-boyfriend, Jack Spheer, comes to National City to unveil his big breakthrough in nano-technology, which has the potential to eradicate all diseases. Lena asks Kara to attend Jack’s conference with her for support. When Kara sees Snapper in attendance she’s inspired to tap back into her reporter skills and questions Jack on his discovery, which ultimately leads to a bigger investigation that puts everyone in danger.
Serie: Supergirl
Director: Armen V. Kevorkian
Guest Star: Claudia Doumit, Ian Gomez, Johnny Ghorbani, Katie McGrath, Rahul Kohli, Tamzin Merchant, Teri Hatcher