Actor Robert De Niro reprised his role as special counsel Robert MuellerRobert Swan MuellerSasse: US should applaud choice of Mueller to lead Russia probe MORE on “Saturday Night Live,” paying a visit to President TrumpDonald John TrumpSenate GOP budget ignores Trump, cuts defense Trump says he'll nominate Stephen Moore to Fed White House: ISIS territory in Syria has been 100 percent eliminated MORE's sons, Eric TrumpEric Frederick TrumpHispanic Caucus demands probe into Trump Organization hiring undocumented workers Nadler: Half of Trump probe targets likely to comply with document requests Eric Trump says his father would enjoy 'easy victory' over Joe Biden MORE and Donald Trump Jr.Donald (Don) John TrumpOn The Money: Liberal groups pressure Dems over Trump's tax returns | Top Trump economist says tax cuts powering economy | Trump Jr. slams Theresa May over Brexit delay | Watchdog warns of 'rosy' assumptions in Trump budget Trump Jr. slams Brexit delay: 'Theresa May should have taken my father's advice' The Hill's Morning Report - Dems contemplate big election and court reforms MORE

In the cold open on Saturday’s show, De Niro as Mueller appeared as a “boogeyman” in Eric Trump’s closet as his older brother reads him a bedtime story.

“Don’t be scared, it’s just me, Robert Mueller, your dad’s friend from work,” he said.

De Niro as Mueller warns Eric Trump, played by Alex Moffat, that some of his dad’s friends may end up in prison, referring to Michael Cohen, the president's longtime personal lawyer, as “federal inmate 10358.”

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He reassures Eric Trump that the country will be “just fine” because it’s “full of good people.”

“Yeah, good people like my dad!” Moffat as Eric Trump responds.

“Well, let’s put a pin in that,” De Niro’s Mueller says.

The sketch follows new court filings from Mueller and federal prosecutors in New York that provided new insight into links between Trump campaign officials and Russia.

“Mr. Mueller, people say you’re the worst thing to ever happen to my dad,” Eric Trump says in the sketch.

But De Niro, prompting cheers from the audience, pushes back: “No Eric, getting elected president was the worst thing that ever happened to your dad.”