Warning: SPOILERS for the Season 1 finale of Who Killed Sara? are ahead.
The Mexican drama centers around the mysterious death of Sara Guzmán (Ximena Lamadrid), who passed away after someone cut her parasailing harness.
Her brother, Alex Guzmán (Manolo Cardona), was convicted of her murder and he spent nearly two decades behind bars.
When he's released, Alex vows to solve his sister's murder once and for all. He zeroes in on the members of the Lazcano family, as Sara had been dating Rodolfo Lazcano (Alejandro Nones) at the time of her death. Alex soon learns that many of the Lazcanos have a lot to hide.
While viewers were hoping for clear answers in the tenth and final episode of Who Killed Sara? there are many unresolved storylines and things that need to be explained. Was the identity of the killer revealed?
Keep reading for a breakdown of the last episode, and to find out if the show will return for a second season.
What happens in the last episode of 'Who Killed Sara?' The ending explained.
The tenth episode of Who Killed Sara?, which is entitled "Two Graves," reveals more about Sara's tragic death through flashbacks. The story regarding her final days unravels as well, and viewers learn that there were several people who would have wanted the teen to die.
Right before she left for the group trip to Valle, Sara watched an alarming video. It revealed that a woman named Flor Sánchez was murdered at the casino owned by her boyfriend's dad, César (Ginés García Millán). She gave the VHS to a friend for safekeeping, in the event that something happened to her.
Shortly thereafter, Elroy (Marco Zapata) told matriarch Mariana Lazcano (Claudia Ramírez) that Sara was pregnant. He implied that the father was her husband, César.
Meanwhile, Mariana's son/Sara's boyfriend, Rodolfo, was under the impression that he was the father of Sara's baby.
Prior to the parachuting incident, Mariana ordered Elroy to keep an eye on Sara, Rodolfo, and her other son, Chema.
She later went on a walk with Sara, and she acknowledged her pregnancy. Mariana promised that the Lazcanos would look after the baby, and she pretended like Rodolfo was the father.
Though Rodolfo didn't want Sara to use the parachute while pregnant, Mariana told her to have some fun before she was a mom.
She encouraged Sara to go parasailing on the boat, and she then asked Elroy to cut the harness. Mariana threatened to tell Elroy's secrets if he didn't (he caused his mother's death when he was a child).
While it seemed like Sara's murder was just moments from being solved, Who Killed Sara? concluded with a twist.
Elroy may have been ordered to cut the parachute, but the finale doesn't reveal if he was able to go through with it. As soon as Mariana threatened him, Elroy became visibly uncomfortable with the idea of harming Sara.
Later on in the episode, he struggled with whether or not to cut the parachute.
After Sara's accident in the water, Mariana pretended to call the police. She later spoke with Elroy on the phone as she cleaned up the boat and threw the knife into the water. She was upset with him, and it's unclear if it's because he left behind a mess, or because he didn't cut the harness.
In the scenes that take place in the present, Alex watches the video of the casino murder. Because the identity of her killer is obscured in the tape, he realizes that there isn't much that can be done with it.
He tells the others (who have been helping him) that César had been running a VIP sex trafficking operation out of the basement of the casino.
Other women have been dying, and they suspect that it's because of this scheme.
Meanwhile, Elisa Lazcano (Carolina Miranda) goes to visit Elroy in the hospital. She asks him for information about her father's basement operation, but her mom walks in.
Mariana tells her daughter not to concern herself with her father's business.
At the end of the episode, Alex finds his sister's diary. In the entries she wrote leading up to her tragic passing, Sara detailed feeling depressed. Another possibility then comes to light: Sara may have completed suicide.
In one of the final scenes of the season, Elisa confronts her dad about the murdered women from the casino. She accuses him of murdering Sara, which he vehemently denies.
While she's there, Alex calls her and tells her that they were both wrong about Sara's death.
As Elisa is talking with her dad, Mariana is still with Elroy at the hospital. She looks on as he flatlines. Doctors attempt to revive him, but it's unknown if he lives or if he dies.
In the last moments, Alex digs up a skull that has a bullet hole in it. A final flashback shows César shooting someone, but it's unclear who it is.
Sara's killer is not identified at the end of Season 1, though viewers suspect that the prime suspects are Mariana, César, or Sara herself.
When is Season 2 of 'Who Killed Sara?' coming out?
Because the Season 1 finale of the Spanish-language drama left many questions unanswered, viewers are hoping to see more of Alex Guzmán's story ASAP.
Unfortunately, Who Killed Sara? has not officially been renewed by Netflix yet. It could be quite a while until the streaming service does greenlight future episodes.
But, the show did make Netflix's Top 10 list in the United States several times within the first few days of its release. This is usually a good indicator for its renewal chances.
Who Killed Sara? is available to stream on Netflix now.