SPOILER ALERT: This review contains spoilers for the Oct. 30 episode of “ 9-1-1 .”

Houston, we have no more problems.

On Thursday’s episode of “9-1-1,” Athena ( Angela Bassett ) and Hen ( Aisha Hinds ) finally made it back to Earth after a four-episode arc that had them journeying to and from space. What was meant to be a quick trip up and back as a reward for saving a billionaire’s life turned into Hen and Athena’s personal Apollo 13.

With help from Hen’s physicist wife Karen (Tracie Thoms) and Athena’s willingness to once again put her life on the line for the people closest to her, “9-1-1” avoided losing two major characters. “9-1-1” hasn’t been shy about killing off major characters, such as Peter Krause’s Captain Bobby Nash last season .

“Listen, no one’s safe at any

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