Insomnia has genre Mystery. Mystery has examples: Red Eye
[Human]: DO you know any movies like Insomnia? [Assistant]: Do you like the actors in Insomnia, or are you interested in movies in the same genre? [Human]: I love Robin Williams. I also like that the movie is drama/mystery which are my favorite genres. [Assistant]: Some other good mysteries are Red Eye and Inception, if you haven't seen those already. [Human]: Could you tell me who starred in Red Eye? 
Sure, that movie stars Wes Craven, Suzie Plakson, Robert Pine, and Carl Gilliard. Wes Craven also directed it! 