'On The Road' was the most intense episode of Siren yet, and you can watch it all again on Freeform. Or just scroll down to see our recap of the most dramatic, emotional and exciting moments. Don't forget to vote for your favorite one in the poll at the bottom!
Ryn's sister attacked the scientists who had been holding her captive.
She transformed and escaped with Chris -- who had no idea she was a mermaid.
Meanwhile, Ryn was getting used to living with humans.
Admittedly she still had a lot to learn about personal space ...
And despite feeling the effects of being out of the water for too long, she refused to leave.
Ryn was getting seriously ill, but she didn't want to abandon her sister.
Xander, Calvin, Ben and Maddie broke into the nurse's home to look for clues about Chris.
But before they could discover anything important, a suspicious group of men arrived and took Donna's laptop.
Decker realized he'd been outsmarted by the mermaid.
All along, she'd been watching the humans in the lab and learning how to blend in with them.
Chris started to notice that his passenger was a little strange.
She was clearly in distress, and Chris was still suffering from his wounds.
Ryn finally agreed to go back to the ocean, and Maddie gave her a tracker to wear.
Her condition was getting worse and worse. Staying on land any longer could have been fatal.
Everyone raced to the beach, just in time to save Chris.
While the friends looked after Chris, Ryn left the group to go and find her sister.
Ryn had an emotional reunion with Donna, who carried her back to the sea.
Ben and Maddie were relieved to see them return to their natural habitat, but hoped that Ryn would return some day.
Can you pick a favorite moment?
Watch every episode of Siren so far on Freeform.
And let us know in the comments which moment you voted for.