
Dale
Dale was an acquaintance of Guinan's who adopted her pit bull Luna, in 2024, after she closed up her bar at 10 Forward Avenue. (PIC: "Watcher")
Okay, so this character is apparently shared between Star Trek and multiple other shows. Aside from real historical figures, is "Dale" the first real individual character who crosses over between Trek and many other non-Trek franchises? That is, the first person who's supposed to really exist in serious shows, as opposed to being a fictional character in the world of the show, or appearing in a dream or vision of a non-Trek character in a non-Trek show, or a silly spoof.
Gary Seven doesn't count for the purpose of my question - Assignment: Earth never made it past the attempted pilot, it was always supposed to be part of Trek's continuity if it had become its own show.
A hypothetical example would be if, say, in an episode of a cop show, Spock the character (not an actor or cosplayer pretending to be him) beamed away before the cops could catch him, and it was played straight, not for laughs.