Episode 3 of The CW's reboot 'Roswell: New Mexico' took an interesting look at Max's conflicting emotions for Liz, but it was Isobel's urge to drive Liz out of the town, in order to protect her brother, Max, that held center stage in the episode.

Starring Nathan Parsons as Max Evans, Jeanine Mason as Liz Ortecho, Lily Cowles as Isobel Evans, Michael Vlamis as Michael, and Michael Trevino as Kyle Valenti, the episode saw Isobel finally having a breakdown, as she is worried Max's feelings for Liz might put their secret identity as aliens in some grave trouble. Being twins Isobel and Max share a strange kind of connection where they both possess powers to read the other's minds and feel what the other person is feeling.

Isobel already had a problem with Max revealing his secret to Liz, and, in Episode 3, we saw her trying to reach inside Liz's mind and hypnotize her into leaving Roswell. However, things didn't turn out the way Isobel had expected. As she tried reaching into Liz's mind, her vision was blocked by Liz's sister, Rosa's memory. Isobel was surprisingly disturbed at the vision, and it almost caused her to throw up as she felt extremely weak after it. 

However, it seems she will once again try to confront Liz, and see if Rosa's memories once again interrupt her vision. The promo trailer to Episode 4 gives us a glimpse of Isobel trying to get inside Liz's mind, but instead, she finds herself fiddling around with Rosa's memory, in spite of her being dead. The clip shows Isobel, sitting in the corner of a cafe and watching Rosa talk to Maria (played by Heather Hemmens) right before Rosa drives away. Isobel seems to be a lot more disturbed by Rosa's memories than Max, who Liz initially suspected was responsible for the death of her sister. 

Liz discovered handprints on her sister's autopsy reports, and the prints were similar to those Max left on her chest when he tried to save her in Episode 1. However, when she finally confronted Max about her doubts, he confessed he had seen Rosa right before her death, but it wasn't he who killed her.

Max's confession, in a way moves the radar towards Isobel who is completely shaken by Rosa's vision. It can be assumed Isobel probably wants Liz to leave town because she herself might have been involved with Rosa's death. Whether Isobel is truly the one who killed Rosa may be revealed in Episode 4, titled 'Where are all the cowboys gone?', which airs on The CW February 5.