Alternate timeline(covers information from an alternate timeline)
Doctor Joshua Kim was a Starfleet crewmember aboard the USS Enterprise-D in an alternate timeline.
He was paged to report to cetacean operations station over the ship's intercom shortly after the ship encountered the USS Enterprise-C near a temporal rift in 2366. (TNG: "Yesterday's Enterprise")
It is not clear if Dr. Kim was a crewmember in the "regular" version of the timeline.