In Smallville’s sixth episode of Season 7, “Lara,” Kara Kent ruthlessly hunts for her Kryptonian crystal. Her careless pursuit causes trouble in the nation’s capitol and eventually leads her into danger. When captured by a government official, a meteor infected solution is pumped through her veins and causes her to relive old memories. Clark attempts a rescue and, in the process, he too gets a precious glimpse of the past.
The episode begins with an epic flashback in which Kara (Laura Vandervoort) and her father Zor-El are standing in a war-torn Krypton. Zor-El tells Kara that Krypton is no longer safe and that she must go to earth. He hands her a crystal and tells her that it contains the information she needs to save her cousin Cal-el, who is already earth-bound.
Last week’s episode ended with Kara leaving town in search of her lost crystal. Worried about his cousin’s whereabouts, Clark (Tom Welling) sets out in this week’s episode to find her. Through a conversation with Kara’s romantic interest, reporter Jimmy Olsen (Aaron Ashmore), Clark learns that Kara was likely headed to the US Department of Domestic Security. Not long after, Clark visits Lionel Luthor (John Glover), who tells him about “Star Hawk,” a government program focused on extra-terrestrial life.
In Washington, D.C., Kara wastes no time hunting down her crystal. Clad in a short red dress, she heads to a trendy night club. Using her super hearing, she hones in on a lab tech who might know something about the crystal. She begins to seduce him, quickly gathering the information she needs. Armed with new clues, Kara rushes to the site of the lab only to find that she has been beaten to the punch. When she returns to the night club to further torment her loose-lipped lab tech, she is intercepted by an angry and concerned Clark.
Annoyed by Clark’s presence, Kara tells him to stop looking after her. She defends her father’s character and resolves to keep searching for the crystal. Concerned about Kara’s safety, Clark tells her to give up the hunt. Unreceptive, Kara launches Clark against the wall, and flies away.
Back in Smallville, reporter Chloe Sullivan (Allison Mack) is researching support groups for the meteor infected. She visits a local clinic, only to find that her friend Lana Lang (Kristin Kreuk) is in charge of the foundation. In a dimly lit office, Lana asks Chloe not to tell Clark about her new project. Unconvincingly, she says that Clark will view her project as too dangerous. Chloe agrees not to tell Clark, but questions Lana’s motives.
Meanwhile, still in dogged pursuit of her crystal, Kara returns to Smallville to conduct more research. She visits Jimmy at the Daily Planet and uses his computer to hack into the US Department of Domestic Security network. Combing through the data, she wonders if LX Dynamics, a LuthorCorp subsidiary, might have possession of her crystal. Before Jimmy can offer a helping hand, Kara jets off to the Luthor Mansion.
At the mansion, Kara fails to locate the crystal. Instead, a shady government official kidnaps her, utilizing kryptonite to weaken her powers. Lana, still spying on ex-husband Lex Luthor (Michael Rosenbaum) using an assortment of cameras hidden throughout the mansion , spots Kara and alerts Clark. By the time Clark gets to the mansion, Lex informs Clark that she’s been taken to a lab in Virginia.
Back in Virginia, a weakened Kara is rigged to a machine that pumps meteor rock solution through her veins. The device forces Kara to recall past memories, allowing the government official to access her inner thoughts. During the testing, Kara’s memories reveal a previous visit to earth. In Krypton’s final days, she slips through a portal and follows her aunt Lara, played by former Supergirl Helen Slater, to the Kent Farm. There, Lara reveals to Kara that she is pregnant with Cal-El (Clark).
Soon after, Clark locates the Star Hawk lab and bursts in on the experiment. Also weakened by the kryptonite, he moves slowly in his rescue effort. When he tries to loosen one of the electrodes attached to Kara, he gains access to her memories. It’s then that he, too, glimpses his birth mother, as well as an angry Zor-El trying to seduce her. Zor-El tells Lara that he has stolen her DNA and implanted it into the crystal. Just then, the memory fizzles out. Before Clark and Kara can fall into further danger, Lionel steps in and shoots the government official.
As a result of the memory, Kara concedes that her father wasn’t the hero she thought he was. Back at the Kent Farm she and Clark have a heart to heart while reminiscing about Lara. For now, it seems, their relationship is restored. But, in typical Smallville fashion, Clark is keeping a major secret. In the final scene, Clark tells Lana about his birth mother. Opening the floorboards beneath the barn, he unveils a precious artifact: Kara’s crystal. Looking both devious and hopeful, Clark tells Lana that Lara’s DNA is contained inside, leaving the audience to speculate what scheme he might have in mind.
With Clark in possession of the crystal and his mother’s DNA, future episodes of Smallville could get interesting. If they’re anything like this episode, they’ll contain the elements that make Smallville compelling: gripping action sequences, mysterious motives, and big secrets.