Starship lifts off tonight at 23:45 Paris time. If all goes to plan the booster gets caught about seven minutes later, something that is almost routine by now.
The moment to watch comes tomorrow. After around 22 hours in space, the ship is supposed to come home to the same tower and get caught too. No Starship upper stage has ever been caught before.
If that works, the whole rocket comes back. Then the only thing between one flight and the next is fuel and a checkout. That's the goal Elon Musk has been chasing since he founded SpaceX in 2002.