Re: What happened with Kes and Neelix?
ENT used smoke a lot. One of the bloopers (from THe Expanse I think) has Bakula hitting his mark and cracking up because the smoke is so thick he can barely see, adlibbing "That's right men, next year fire extinguishers for everybody."
Dr. Howard, Dr. Fine, Dr. Howard: For duty and humanity! --Men in Black (1934)