The Flash (Kingdom Come) can not only detect those in other dimensions, but interact with them as well.
Detect cross-dimensional portals or barriers
The user can sense activity in these portals from their own world. They can go so far as to detect the outer reaches of a dimension, even breaking the fourth wall.
- 4th Wall Awareness: the ability to realize that the world they are living in is a comic/television/video game.
- Dimensional Vision: see to other dimensions.