In the next episode of "Supergirl," Kara Danvers a.k.a. Supergirl (Melissa Benoist) reunites with Mon-El (Chris Wood) when he is found on a spaceship that crashes on Earth.

The trailer for the upcoming installment titled "Wake Up" was just released recently and showed Supergirl talking about her lost boyfriend Mon-El. "Past couple of months when I dream, I see Mon-El," she says to her sister Alex (Chyler Leigh). Kara was torn when he had to leave the planet in order to avoid breathing the toxic gas that was harmful to his kind. Nevertheless, it seems that Mon-El was aboard a spaceship that crashed into the sea. Supergirl and her crew go to the wreckage to investigate and find a couple of pods with life forms inside them. One of them has Mon-El. They immediately retrieve him and bring him back to headquarters.

Monel-El is shown lying in bed to recover as Kara visits him and kisses him on his forehead. However, something does not seem right with her boyfriend. He suddenly awakes and gets up from bed. He then snoops around the headquarters and knocks out a guard to get something. However, he gets caught and is brought to a holding cell. Later, Kara confronts him and says, "Is it not you?" Mon-El reassures Kara that it is really him but she continues, "Then make me believe it."

In the last episode, the Danvers sisters went back to their hometown for some rest and relaxation. The story then flashbacked to the time when they solved the murder of their good friend Kenny Li (Ivan Mok). The killer turned out to be the town sheriff who eliminated Li because he had damaging evidence against him.

"Supergirl" season 3 episode 7 will air on Monday, Nov. 20 at 9 p.m. EST on The CW.