There are three possibilities...
1. Canon will officially establish that Ro, Tom, and/or whoever are dead.
2. Ro, Tom, or any other useful character will resurface alive and likely appear in a future episode.
3. They won't tell us either way, and each of us can set whatever head canon we like.
1. Canon will officially establish that Ro, Tom, and/or whoever are dead.
2. Ro, Tom, or any other useful character will resurface alive and likely appear in a future episode.
3. They won't tell us either way, and each of us can set whatever head canon we like.