Sawyer was smoking a cigarette. ("Pilot, Part 1") later, he tried to pull one out and smoke it after trying (and failing) to euthanize Edward Mars. ("Tabula Rasa") He was briefly seen smoking a cigarette during the scene where Kate and Sayid questioned Sun and Jin on where they got their water. ("White Rabbit") Sawyer was seen smoking and reading his letter when Jack interrupted and began looking through his stash for the missing inhalers. ("Confidence Man") It was the last time Sawyer was seen smoking. However, an open pack of cigarettes was sitting atop his book when Hurley enquired into the flight manifest("Raised by Another").
Hurley called Sawyer a "Chain-smoking jackass" to Sayid. ("Pilot, Part 2")
Locke mentioned that Sawyer could have set off the fireworks on a time-delay using a cigarette. ("Confidence Man")
There was a cigarette among various debris on a table in The Pearl. ("?") ("Exposé").
In the Pearl Orientation video, when Mark Wickmund was standing in between the two viewing chairs, there was cigarette smoke rising up to his right.
The cigarette found by Locke and Eko in The Pearl Station has not been identified. There was no indication in "Exposé" that the cigarette was left by Paulo. It's possible the cigarette was actually a joint, as the rest of the table appeared to have marijuana buds on it.
Paulo had to use nicotine gum in order to quit; Nikki stopped Paulo from smoking as they stole Zukerman's diamonds, noting that ashes could become evidence of their theft. ("Exposé")
Cigarette stubs can be seen in the ashtray in Christian Shephard's hotel room in "White Rabbit". However, Christian has never been seen smoking in any of the episodes where he appeared, including the bar scenes where other people were smoking (e.g., in "Outlaws"), and according to the maid he had not slept in his hotel room in three days.
Locke was trying to light up after his support group meeting in "Orientation".
Eric's Expert Service gas station, where Sawyer played a con in "The Long Con", featured Portsmouth and Bilson brand cigarettes. The Portsmouth was similar to Marlboro, and Bilson appeared to be a type of Menthol due to its green Logo.
Bilson cigarettes appeared in the 2002 film May (in the film and/or the DVD commentary). Also, George Bilson co-wrote the screenplay for the 1945 film What, No Cigarettes?. However, the connection of these two possibilities to Lost is unknown. The brand may be named for Gregg Bilson, Sr. Bilson is the founder of Independent Studio Services, a company that produces props for the film and television industry. Examples of Bilson and Brezza cigarette packs can be found on the website of Studio Graphics, the company's graphic design and print shop.
In the January 23, 2006 official podcast, Damon Lindelof and Carlton Cuse joked about a script in the writer's room inside a glass box marked "In Case of Cancellation - Break Glass". This script is said to be a 4 page scene in which Joop, a talking orangutan, will explain every mystery on the Island while smoking a pipe.