If you've ever watched Star Trek: The Original Series you know it had a trope or a meme where an "away team" would beam down to the planet and suddenly one of them would be killed. Usually vapourized or dragged off by a yeti or somesuch. And as my four year old once said to me "Red people fall down. Not red people don't fall down." This is also known as the redshirt phenomenon. To this day, when I see three main characters (on any show) plus some guy we've never seen before, someone is sure to call that guy out as a red shirt just as the suspenseful music starts to rise.
Well, Matt Bailey has run the math. Are red-shirted crewmen more likely to die than yellow or blue shirts? Indubitably. But - is it good news or bad news, redshirt-wise, if the episode also features what I've always referred to as Kirk putting his boots on, though strictly speaking he does that after the plot point Matt refers to as "meeting" alien women. See how some solid data analysis and well chosen visuals can truly illustrate the redshirt phenomenon on Star Trek, at least for TOS. The powerpoints alone are worth the click.