Marc Cherry Yeah, I Struck Nicollette, BUT ....

3/5/2012 6:00 PM PST

Marc Cherry -- Yeah I Struck Nicollette Sheridan, BUT ....

"Desperate Housewives" creator Marc Cherry is asking the judge in the Nicollette Sheridan case to let his lawyers impeach the fired actress on grounds she has been inconsistent in her story that Marc violently hit her across the head during an argument.

Cherry admitted on the stand today his fingers came into contact with Nicollette's head but he denied violently hitting her. 

According to new documents obtained by TMZ ... Cherry's lawyers want the jury to hear that Nicollette has changed her account ... originally alleging a slap and then escalating the allegation to a "violent hit." And during her testimony Nicollette changed her description yet again to a "nice wallop."

Cherry and his lawyers believe the inconsistencies prove Nicollette's battery claim is groundless.

As for what Cherry says he did ... in his testimony today he claims he was just demonstrating how a scene should unfold when his fingers made contact with Nicollette's head.