Collet-Serra made his TV directing debut with the ABC pilot The River, a horror drama from Paranormal Activity writer-director Oren Peli. The episode was filmed in Puerto Rico and the next seven episodes were produced in Hawaii. The show has been met with generally favorable reviews, with a collective score of 64/100 from Metacritic from 27 critics. Matt Roush of TV Guide called the show "a terrifying heart-stopper, a cleverly cinematic supernatural adventure that takes us on a wild ride into an exotic heart of darkness."USA Today's Robert Bianco stated, "There are moments when The River, with its curse-around-every-corner setup, threatens to topple over into farce. But a strong cast and that things-that-go-bump-in-the-night shooting style so far keep the show on course". However, Mike Hale of The New York Times rated the show poorly, saying "The mixture of Lost storytelling and Paranormal Activity style is neither intriguing nor particularly scary, and it doesn't help that there's hardly a glimmer of humor".
Collet-Serra formed his own production house, Ombra Films. With money from StudioCanal, the small shingle will make low-budget English-language horror flicks, with an eye toward launching the careers of up-and-coming Spanish filmmakers. "We've seen how many talented directors are coming out of Spain, but there hasn't really been a platform for them to find work in films," Collet-Sera's producing partner Juan Sola told Deadline. "They look up to Jaume as a guy they want to become and we thought, how about a company that creates a bridge between Spain and the U.S., similar to what Luc Besson provided in France? Already, we are being bombarded, and we feel directors will find Ombra a fantastic platform. Jaume loves mentoring new talent.". The venture's first film is called Mindscape, a psychological thriller about a man with the ability to enter people's memories starring Taissa Farmiga, Brian Cox and Mark Strong.