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" as the show mocked the departure of former Attorney General Jeff SessionsJefferson (Jeff) Beauregard SessionsChief Justice of California Supreme Court leaves GOP over Kavanaugh confirmation Trump attorney general pick a prolific donor to GOP candidates, groups: report Press: Mueller closes in on Trump MORE.

Aidy Bryant's Sarah Huckabee Sanders, Beck Bennett's Vice President Pence and Donald Trump Jr.Donald (Don) John TrumpIntel panel expects to refer more cases of suspected lying to Mueller Trump Jr. says his dad is a 're-gifter' Brzezinski apologizes after backlash over homophobic remark about Pompeo MORE and Eric TrumpEric Frederick TrumpDe Niro returns to ‘Saturday Night Live’ as Mueller with warning for Eric Trump Conway's husband responds to Trump tweet on Cohen: 'Other than that, totally scot-free' Trump Winery petitions to hire more foreign workers MORE, played by Mikey Day and Alex Moffat, respectively, each bid farewell to Sessions, played by Kate McKinnon, who lamented that he did everything President TrumpDonald John TrumpProsecutors investigating Trump inaugural fund, pro-Trump super PAC for possible illegal foreign donations: NY Times George Conway: Why take Trump's word over prosecutors' if he 'lies about virtually everything' Federal judge says lawsuit over Trump travel ban waivers will proceed MORE asked of him before being fired.

De Niro's Mueller then enters the room to thank him for "all the help with the investigation." Mueller tells Sessions he helped with his report “more than you’ll ever know." 

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“Am I in the report?” Sessions asks.

“A little bit,” Mueller responds.

“OK, what about the president?” Sessions adds.

“A lot of bit,” Mueller said. 

De Niro's Mueller then hands Sessions a piece of toilet paper from the bottom of Trump's shoe, likening it to a piece of clothing that makes an elf free in the "Harry Potter" series. 

The two then embrace as Sessions suggests Mueller might miss him, given acting Attorney General Matthew Whitaker's past comments showing a desire to curb the special counsel's investigation.

Sessions, a frequent target for mockery on "SNL," was fired last week. Trump had been openly critical of the former Alabama senator, particularly over his decision to recuse himself from overseeing Mueller's investigation.

He appointed Whitaker as acting attorney general, a move that drew criticism from Democrats and legal experts who suggested it was unconstitutional. Whitaker has written opinion columns for The Hill and CNN advocating for curbing the scope of the Mueller investigation, and suggesting stifling its funding.