Dressing up on Halloween can make you feel like a different person. If you pretend to be a vampire, or a cowboy, or a sexy nurse, then you take on that role for the night. On 'Parenthood' (Tue., 10PM ET on NBC), a couple plays dress-up for the evening. But then it leads to something real.

[Warning: Spoiler alert.]

After their son goes to bed, Crosby (Dax Shepard) and Jasmine (Joy Bryant) sneak downstairs to chomp on their kid's Halloween candy. They're still wearing their costumes: Crosby is daring stuntman Evel Knievel; Jasmine is Indian maiden Pocahontas.

The pair seems content, like they've recovered from their past history. Jasmine had a son with Crosby, but she kept this a secret for five years. She felt that Crosby was irresponsible and not ready for fatherhood. But now, the couple are back together again.

"This is my favorite part of Halloween!" Jasmine says, while scarfing down a candy bar. Next, she asks if she has chocolate on her teeth. "You do," Crosby replies. "You look super-cute though." Then the joking ends, as things turn serious. Crosby leans down on one knee and asks her to marry him.

"I don't want to live without you," he says. Jasmine is startled -- she pauses, halfway through biting into another piece of candy. What will she say? Is Crosby learning to be a real adult? Or is he just dressed like one for the night?