A man who blacks out for seven hours each night has feared the day when his two lives collide, and when they do, the lives of millions hang in the balance.

Hello Jeremy, interesting idea but there is a little problem with the logline

Your wrote the line: “has feared the day when his two lives collide”

The problem with that line is you haven’t told us what his two lives are. For instance if you said “A banker who’s secretly a spy fears the day his two lives collide…” it would make sense because we would know what his two lives are.

Second, fear is not really an action. You want your hero to be proactive. For instance, using my example above the logline might say, “A banker who is secretly a spy “fights” to keep his two lives from colliding…”

As a result, I would change the word “Feared” in your logline to something more proactive. Give your protagonist something he must do.

Hope that helped, good luck with this!