"NCIS" star Michael Weatherly will go into the New Year with a clean legal slate ... because his DUI case is over.
Weatherly pled no contest Tuesday to driving with a blood alcohol level over .08 ... and the remaining counts were dismissed.
His sentence ... 3 years probation and a three-month alcohol program (and a MADD program).
He has until June to complete everything.
Weatherly was arrested in November after he was stopped for speeding in Hollywood.