Two years ago, Aidan Sleeper needed to find an apartment.

Sleeper, the locations manager for “Billions,” returning Sunday for its fourth season on Showtime, scouted more than 100 places that list for tens of millions of dollars, but he couldn’t find the right one. “It was impossible,” he said.

The apartment wasn’t for his own use — he and his wife rent in Clinton Hill, Brooklyn. No, he had to lock down a Manhattan residence for Bobby Axelrod, the “Billions” hedge fund phenom played by Damian Lewis. The space couldn’t be comfortable or cozy. It needed to intimidate, astound, overwhelm, gut punch your breath away.

“We always joke, ‘billionaire, not millionaire,’” Sleeper said on a January morning at the “Billions” production office in Greenpoint, Brooklyn, as he scrolled through a desktop folder of photos. He clicked for a moment on a $65 million triplex that hadn’t impressed him when he toured it: “You walk in there and it’s like, really?” He shrugged and scrolled on.

Months after his initial deadline had passed, as he was viewing a ho-hum TriBeCa penthouse, he saw, from its terrace, another penthouse blocks away. A glass box plunked on top of an old print factory, it had a double-height living room, a wraparound terrace, 270° views of the Hudson and the East River, too. It was urban, masculine, almost stark in its poured concrete floors and severe lines — it said billionaire, not millionaire. He rented it.