Episode 19 of "Limitless" ended with Brian's life going back to normal after the end of his time off with Piper. However, spoilers for episode 19 suggest that it won't be too long till the tempest takes over the calm.

An article published by Design & Trend reveals that in the upcoming episode, the FBI will put our hero under pressure as it places him in 24-hour surveillance.

Based on the official plot synopsis released by The Futon Critic, "Brian's double life unravels when Senator Morra makes contact just as Brian's placed under 24-hour surveillance by the FBI following his rogue trip to Russia. Also, Mike and Ike tell an already suspicious Rebecca about Brian's off-book interaction with Morra's henchman, Sands."

In the trailer of "A Dog's Breakfast," Feds delve into Brian and his correspondence with Senator Eddie Morra, whom they previously linked to NZT. Senator Morra will be played by Bradley Cooper, who returns to the series in the upcoming episode.

Meanwhile, Brian's relationship with Rebecca has been on thin ice lately, and our hero's surprise visit to Russia didn't make it any better.

Aside from the FBI and his deteriorating relationship with Rebecca being his major pains in the neck, the promo trailer also reveals that Brian is going to figure that Piper is going through some serious trouble and he will do everything he can to help out.

In the trailer, Brian tries to free Piper from Eddie but he only ends up beseeching him to release the woman who formerly tried to snuff him out.

How Brian saves Piper and redeems himself to his family and friends after losing their trust are two things to watch out for in the next episode.

"Limitless" airs on CBS every Tuesday at 10:00 P.M.