Encounter at FarpointQ appears in 20th century military uniform with an unlit cigarette in his right hand.
Lonely Among UsData smokes a pipe (much to the dismay of the rest of the crew, especially Lt. Yar) as the first part of adopting his Sherlock Holmes character.
The Big GoodbyePicard is offered a holographic cigarette in the police station. His coughing displays his displeasure.
ManhuntPicard as Dixon Hill lights up again in full view, without coughing.
Deja QAfter Q gets his powers back, he brings the Mexican band to the bridge, and gives Riker and Picard a cigar, and after he leaves, he becomes the smoke from Picard's cigar.
CluesGuinan has a lit cigarette in a holder in D Hill's outer office, doesn't take a puff. (Watch how the cigarette always changes to a different length at each camera cut. A common problem in any movie where smoking is portrayed).
Time's ArrowSamuel Clemens chomps on a huge cigar. Suffers from tobacco addiction withdrawal in the second part.
A Fistful of DatasTroi, playing the mysterious stranger, is seen smoking in the sheriff's office.
Above items gathered from
this siteAs a side note, in the original series, the network wanted Spock to puff on a “space cigarette” to satisfy a tobaco sponsor. Rodenberry wouldn’t allow it.