Smallville - Season 8 Episode 4 -

When Tess inadvertently activates the mysterious Kryptonian Knowledge crystal found in the Artic, it omits a high-band beacon which summons an alien queen, named Maxima, who arrives on Earth and begins a search for her new mate, with a kiss that is too strong for humans to survive. Meanwhile, after just moving in together, Jimmy finds a letter that Chloe wrote for Clark that revives Jimmy's insecurities.