Promise-Clark has second thoughts about Lana marrying Lex, and Lana has the same concerns. Meanwhile, the doctor involved in the secret behind Lana's pregnancy threatens Lex with his knowledge.
Okay, so the Clark-Lex-Lana triangle has been more of an annoyance than a privilege to watch this season, but "Promise" is such a well crafted episode is hard to not find this hour of television moving, even stunning. "Promise" isn't like any other episode that Smallville has ever done and it's a truly refreshing change from the usual way Smallville episodes are paced. The episode is split into 3 perspectives: Clark, Lana and Lex, who all 3 go through much inner struggle throughout this hour as Lex and Lana prepare to get married. There are also wedding invitations during the episode to show the time lapse that each character is in and does a beautiful job of connecting the events of the episode until it's overwhelming conclusion.
First, there's Clark's perspectiove of Lex and Lane's wedding day. The dream sequence of Clark killing Lex at the wedding only for Lana to kill him in return is well done. Tom Welling does a fine job throughout as Clark is confused about what do as his about to lose the woman his loved his whole life. I loved how Chloe pushes Clark to go after Lana and that Lana will be destoryed if she marries Lex. Then there's the scene of Martha giving Clark some advice about going after the one you love like how she went afetr Jonathan when she fell in love with him. My only problem with that scene is that Martha has been convincing Clark to leave Lana alone for past episodes now she practically tells Clark to steal Lana away from Lex? Anyway, Clark going to Lana to declare his love was well acted by both actors and one of the few touching Clana moments.
Next, we have Lex's perspective of his wedding day. Lex's dream sequence has to be one of the scariest scenes Smallville has ever done. It's starts out with Lex watching a big screen version of Lana's sonogram in a large dark room by himself. Suddenly, the unborn baby turns into a freakish creature and Lex wakes up. A fine directing job by Rick Rosenthal! The best part about Lex's storyline is how he kills Dr. Langston, Lana's pregnancy doctor. It's a sick and twisted scene as Lex beats him to death and puts his body is a coffin under the church where his about to marry. Micheal Rosenbaum is exceptional throughout and the scene of Lex washing the blood off his clothes shows how dark the character continues to become. Also, Lex's scene with Lionel was powerful as father and son butt heads once again on his wedding day. The way Lionel said he had to clean up Lex's mess and slapped him was flawless acting by John Glover once again.
Lastly, there's Lana's perspective of her wedding day. Lana's dream sequence is the weakest of the bunch but it's nice how the writers brought back the day Clark saved Lana from the twister back in "Vortex". Kristin Kruek gives an impressive performance as Lana still struggles through her decision to marry Lex. I loved her scene with her Aunt Nell, who returns after her depature after Season 2. It's a beautiful scene between both women as they take about the sacrifices and decisions they've faced in their lives. The most significant aspect of Lana's storyline is that she finds out Clark's secret. Finally, after 6 years of back and forth complaining and confusion, Lana gets what she's wanted from Clark for so long. But an unforseen twist is Lionel's contfrontation with Lana before she marries Lex. It's glad to see Lionel's old evil self again yet him blackmailing Lana about killing Clark if she doesn't marry Lex comes out of now. The mystery behind Lionel's intentions isn't revealed in this episode but it leaves a lot to be answered for in future episodes. The end of the episode is one of the saddest moments of Smallville as Clark loses Lana for good. Just the way both characters look at each other for one last time as they are world apart is slighty heartbreaking. "Promise" is one of Smallville's most creative episodes and it pays off at the end creating more promising storylines for the rest of the season.