In the last episode of The Flight Attendant's first season, Miranda fights with Feliks in an elevator, then is later found lying motionless in a bathtub with Feliks standing over her. It is later made clear that Miranda got out of the room alive.
However, I don't understand how she could possibly be alive. The moments between the elevator scene and the bathtub scene aren't shown, so the viewer has to guess at what happened. Since Feliks and Miranda were out to kill each other, it would make most sense for Feliks to kill Miranda and then drag her body to Cassie's bathroom. However, it would've been very sloppy of him to not check that she was still alive.
I can't really imagine another possible scenario for how Miranda ended up in the bathtub, though.