It is a busy, but uncertain time for NASA and the International Space Station.

Several missions are scheduled, but the Boeing Starliner crew’s status in being flux could affect current and future missions on the books.

At this point NASA and Boeing are aiming at returning the two-member crew on the spacecraft that got them to the ISS in June.

But there are some big decisions to be made if that will come to fruition, as the return of astronauts Butch Wilmore and Suni Williams remains up in the air.

They’ve been onboard the space station for 51 days, far exceeding their originally scheduled eight-day mission that launched on June 5.

Now it’s time for the next mission – SpaceX's Crew-9 — which means it’s also time for the Crew-8 team to return after their stay on the ISS.

But with that SpaceX Crew Dragon capsule occupying a docking port, and Starliner docked in the other, one spacecraft must leave to allow the Crew-9 Dragon to dock.

“In order for us to send up Crew-9, we have to take off a vehicle," said ISS Program Manager Dana Weigel. "Our plan is to undock Starliner first to free up a port, then send up Crew-9.”

But questions remain if the thruster and helium leak issues that have stalled Starliner’s return will be resolved in time for that to happen.

“It’s a pretty busy time for commercial crew — it’s a pretty busy time for Dana," said Steve Stich, NASA's Commercial Crew Program Manager. "But we are working through the Starliner investigation, getting through the final parts of that investigation."