Sheridan has sued Cherry for battery and wrongful termination of employment, claiming that her character Edie Britt was killed off after she made a complaint against him. She is seeking $6 million (£3.7 million) in damages.
Asked about the altercation at Los Angeles Superior Court yesterday (March 1), Sheridan alleged that Cherry lashed out after she asked him to write Edie an extra line of dialogue for a scene.
When Cherry "got agitated and annoyed and didn't respond", Sheridan approached him again later in the day and was led to a side area by Cherry, away from the rest of the team.
"Cherry stepped toward me and with his right hand he hit me upside the head," she testified, saying that afterwards she yelled at him: "You hit me in the head! That is not okay. That is not okay."
The court heard that Cherry later approached the actress and said to her: "'I am on bended knee begging your forgiveness."
Sheridan continued: "I said, 'Why would you do that?' He wrapped his arms around me and apologised again. Then he changed the subject."
Despite the incident, Sheridan returned to the Desperate Housewives set and shot the scene with new dialogue that Cherry had written for her.
"I pride myself on being a professional," she explained. "I wasn't going to let everybody else down."
Sheridan's lawyer Mark Baute told the court during his opening statement on Wednesday (February 29) that Cherry hit his client "in the head - hard - without consent".
A lawyer for Cherry and Desperate Housewives broadcaster ABC counter-claimed that Sheridan was "not wrongfully terminated, nor was she battered", arguing that "people die a lot on TV".
Desperate Housewives stars Eva Longoria, Marcia Cross, Teri Hatcher and Felicity Huffman have all been named as potential witnesses for Cherry in the trial.