The CW's Official Description: "Lara"

FEATURE FILM SUPERGIRL HELEN SLATER FLIES INTO SMALLVILLE AS LARA KENT — Clark (Tom Welling) learns Kara (Laura Vandervoort) is in Washington searching for the crystal. Kara is captured after she breaks into the lab and sedated with a kryptonite-infused truth serum. The serum causes her to relive a prior trip to Earth when she followed Clark’s biological mother, Lara (gust star Helen Slater), to the Kent farm. Clark arrives in time to save her but, after searing the machine with heat vision, he also falls victim to the serum and sees what Kara sees: his mother.
Kristin Kreuk, Michael Rosenbaum, Allison Mack, Erica Durance, Aaron Ashmore and John Glover also star. James Conway directed the episode written by Don Whitehead & Holly Henderson (#3T6305).

Smallville keeps its High Ratings

Cure" Ratings: 5.1 Million Viewers"Cure" continued Smallville's Season Seven winning ratings streak with 5.1 million viewers. Variety notes that Smallville "remains potent" in its incredibly competitive timeslot.
Smallville had its best ratings in the ages 18-34 and 18-49 demographics since January, when the network screened the popular episode "Justice." Smallville also ranked or tied for #1 in the 8PM hour with Males 18-34, 12-34, and 12-17, and placed second in its timeslot among teens.
These high marks came despite heavy competition from the Major League Baseball playoffs on FOX.

The CW putting Smallville's Supergirl Front and Center

Recently, the CW began airing Smallville season 7 promos that featured Supergirl (Laura Vandervoort), and only Supergirl, raising the question among fans as to just how integral the girl of steel will be in the season 7 story. With the talk of Smallville coming to end, is it possible the CW is laying the seed for a Kara centric series?Of course, a few promos aren't enough to place bets on that idea, but it is still not that entirely unbelievable. No matter how you look at it, Kara's arrival on Smallville is being treated as an ‘event' of sorts, and one that is not likely to merely hold subtle changes for the show.We know that Kara figures heavily in the premiere of the series, and all indications are she will be an episode to episode regular as the season moves on, engaging in every facet of the shows story momentum. Relationship hints have been thrown at Lex and Jimmy, and the word of a feud with Martian Manhunter has been jangling the grape vine in addition to the Clark/Kara interplay that is expected.However, what if Smallville fans don't like Supergirl? Having already invested significant production time and creative focus on making Kara an integral part of the Smallville canvas, it would be extremely difficulty to extract her should the experiment crash and burn. It is interesting that Kara is being introduced so forcefully into the mythology. With such an immediate impact on the dynamics of the show, you would think, that the Smallville crew would have then their time and tested the character out on audiences before committing such a large portion of the show to here. Then again, perhaps the fact that the CW is pushing the character on their marketing efforts is a tell tale sign of why there is a hot new female character. That seems to the trend over there these days.