In recent episodes, it's seemed like Jane The Virgin was losing its telenovela edge. But the Season 4 finale was a brutal reminder that fans are never safe from highly dramatic surprises. Major spoilers for the Jane The Virgin Season 4 finale ahead. In the last moment of the episode, Michael returns to Jane The Virgin. About four years in the characters' timeline have passed since his death, so it was a huge shock to see Brett Dier back on the series. These theories about Michael on Jane The Virginmay help explain just how he (or someone who looks like him, at least) has ended up back in Jane's life again.
What viewers know for certain is fairly limited. In "Chapter 80," Rose told Rafael that she had information that was going to change his life forever. And based on that epic Season 4 ending, Rose presumably tells Rafael in "Chapter 81" that Michael is still alive. It's likely that Rafael then seeks out Michael for himself without telling Jane. So when Jane arrives at Rafael's apartment to be proposed to, she sees her dead husband standing there.
Michael doesn't say anything and no one ever says specifically that Michael is alive. So there is a chance that Dier showing up doesn't really mean that Jane's husband didn't die for real in the middle of Season 3. Fans will have to wait for Season 5 to find out what exactly is happening, but one of these theories just might be the solution to Michael's reappearance.