“I never used to swear, so when I do that, it has added meaning,” Diane Lockhart (Christine Baranski) declares in “The Good Fight’s” Season 4 trailer. “And this motherfucking nuts.”

Indeed. Dogs are running around the office, a mysterious man (John Larroquette) is waxing philosophic, and Diane has a toucan sitting on her desk. But this is the nuttiest thing of them all: “I have cases disappear when the judge was given Memo 618,” Diane reveals. “It seems to allow rich and powerful people to not comply with judicial rulings.”

Unsurprisingly, the thought that certain people see themselves as above the law does not sit well with Diane. “We all should be subject to the same justice,” she says in the spot. But, as her colleague Lucca Quinn (Cush Jumbo) points out, the lawyers themselves are privileged, too. “It’s called power,” Lucca observes. “It’s why people go into the law.” Is it possible that Diane and the rest of her law firm are just as entitled as the people they are fighting in court?

Created by Michelle King, Robert King, and Phil Alden Robinson, “The Good Fight” is a spin-off of the Kings’ CBS drama “The Good Wife.” Audra McDonald, Sarah Steele, and Delroy Lindo are also among the cast.

“The Good Fight” returns on CBS All Access April 9.

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