The reason I undone your edit to Martin Stein (Arrow) is because before I added the category Deceased Characters it wasn't there, and then you removed it and added a space in between to parts of the template why I don't know but the Deceased Characters category still wasn't on there if that was why.
If you are wondering why I didn't put any of the other episodes that have their title confirmed, well The Flash's only other confirmed title is for episode 11. While Arrow's and LoT's are episode 10 and Supergirl's doesn't have one. Plus all three with one only have the year it will be on TV not the month and day.
To the best of my knowledge, neither have been mentioned by their last names. And I'm not the one who gave them those names on their articles (have a feeling that you've mistaken me for the two that did).