E.F.T

UPDATED 1/7/09: Stephen Lobo plays Randall Brady, the Daily Planet's new City Editor who shares a scene with Tori Spelling's Linda Lake.
UPDATED 12/3/08: Ausiello at Entertainment Weekly has indeed confirmed that Lois is the one that does the interview with Clark that "outs" his true heritage as a super-powered alien to the world.
UPDATED 11/25/08: Linda Lake threatens to expose Clark, but Clark decides he's going to reveal the truth about himself - on his own terms - before she gets the chance to.
- The news media is in a frenzy over the Red-Blue Blur, and they approach Chloe to ask what it's like to be the hero's best friend. They ask what it's been like to keep his secret for so long, which may imply that her memories are returned by this point.
- Jimmy is transported to Metropolis General, and Chloe refers him as her husband.
- A teenage admirer fakes a fall so Clark will rescue her.
UPDATED 11/14/08: Title Revealed.
- This is the episode that Entertainment Weekly's Michael Ausiello revealed would feature the return of Tori Spelling as Linda Lake (from the episode "Hydro")
- E! Online's Watch With Kristin also intimated a rumor of something that seems to be coming to fruition - Clark will reveal his secret to the world. How's he going to get out of that one? Who knows...
- Lois Lane (Erica Durance) returns in this episode.
- Aaron Ashmore (Jimmy), Cassidy Freeman (Tess), and Justin Hartley (Oliver) do not appear in this episode.

Source: kryptonsite.com

An explosion at LuthorCorp kills all the Board members and injures Oliver (Justin Hartley), who was there to announce the merger of his company with LutherCorp. Oliver believes that Lex is responsible for the blast, but Clark (Tom Welling) and Lana (Kristin Kreuk) learn that the bomber is Winslow Schott (guest star Chris Gauthier), a toymaker and former Queen Industries employee with a grudge against Oliver.

Smallville 8x15 "Infamous"

UPDATED 1/7/09: Stephen Lobo plays Randall Brady, the Daily Planet's new City Editor who shares a scene with Tori Spelling's Linda Lake.

UPDATED 12/3/08: Ausiello at Entertainment Weekly has indeed confirmed that Lois is the one that does the interview with Clark that "outs" his true heritage as a super-powered alien to the world.

UPDATED 11/25/08: Linda Lake threatens to expose Clark, but Clark decides he's going to reveal the truth about himself - on his own terms - before she gets the chance to.
- The news media is in a frenzy over the Red-Blue Blur, and they approach Chloe to ask what it's like to be the hero's best friend. They ask what it's been like to keep his secret for so long, which may imply that her memories are returned by this point.
- Jimmy is transported to Metropolis General, and Chloe refers him as her husband.
- A teenage admirer fakes a fall so Clark will rescue her.

Smallville 8x16 "Turbulence"

UPDATED 1/18/09: Clark tells Chloe that his recent "brush with celebrity" (in "Infamous") might mean that having a "double identity" isn't such a bad idea after all. The red-and-blue combo might just be saved for those occasions.
- Davis tells Chloe that she can't blame herself for what happened on her wedding day.

UPDATED 12/8/08: "Turbulence" as a title refers to interactions between Clark and Tess on Oliver's jet as well as turbulence associated with Jimmy's return from his coma.
- Tess takes Clark out of town with her to an important press conference in another city.
- Clark tries to find out from Tess how much Lex had actually told her about him.
- Jimmy reacts violently seeing Davis and has an angry outburst towards Chloe.
- Davis visits a cathedral where he confesses that he has hurt people that he cares about.

Smallville 8x17 "Hex"

UPDATED 1/3/09: Clark's birthday gift for Chloe is a vintage copy of "Tales of the Weird & Unexplained."
- Jimmy does not attend Chloe's birthday party. However, he does have a conversation with Chloe when she appears to be Lois.
- Clark learns fairly early on that "Lois" is actually Chloe.

UPDATED 12/22/08: From Entertainment Weekly's Ausiello: "In one scene from the ep, Clark stares lovingly into Chloe's eyes, but only because he thinks it's Lois. It's at that moment that Chloe learns how hard Clark has fallen for Lois. Um, awkward!"
- And an addition from TV Guide's Matt Mitovich: "a truly magical magician fulfills Chloe's wish to have Lois' "easy" life ... by transplanting her into her cousin's body. While my frenemy already teased a "longing look" between Clark and "Lois" — and Erica Durance's admirers can obviously count on seeing gobs of their fave actress — Chloe fans should be very pleased with an epiphany their girl reaches at episode's end. By the way, you know Clark gets a wish granted as well, right?"
- Contrary to some speculation, Chloe's "epiphany" does not end with reviving her journalism career.
- Clark's "wish" of course is to lead a simpler life - he says it but doesn't exactly expect it to be granted, nor is he aware that "Cassie" will make it happen.
- Erica Durance will be playing Chloe-as-Lois.

UPDATED 12/15/08: The episode starts with a celebration of Chloe's birthday at the Ace of Clubs.
- Lois is out of town during the period when Chloe is "Lois" so the two won't share any screen time or give us a case of double-vision. (Lois is there for the birthday party, goes off on assignment, and is back by episode's end, though)
- Time in Lois Lane's shoes reveals Clark's feelings for Lois to Chloe.
- A spell is cast on Clark that makes him believe he is a simple reporter with glasses.

UPDATED 12/9/08: This episode puts a spin on the "Chlois theory" as a magic spell turns Chloe into Lois... literally.
- Cassidy Freeman (Tess) and Sam Witwer (Davis) do not appear in this episode.

Smallville 8x18 "Eternal"

UPDATED 1/26/09: In one of the flashbacks, young Lex sees Davis (as a child) in one of the rooms of the mansion. When Davis takes off a wool hat that Lex is wearing revealing his baldness, Davis asks him if he is Warrior Angel.
- Young Lex discovers that "a man" has been doing experiments on Davis and put needles in him.
- In the flashback, Martha Kent visits the Luthor mansion (sadly, off screen).
- Young Davis is left in an alley by Lionel's aide.
- In the present day, Chloe and Clark discover that Davis has stopped in the same field that Clark landed back in 1989. While there, they find a charred truck.

UPDATED 1/22/09: For this episode, young versions of both Lex and Davis Bloome will be cast in flashbacks that date back to the 1989 meteor shower. Sadly, it doesn't seem like we'll be seeing Lionel, Martha, or Jonathan in these flashbacks.
- The four characters featured in this episode are Clark, Chloe, Davis, and Tess.
- Tess and Davis finally have some interaction in this episode.

Smallville 8x19 "Stiletto"

The four characters that appear in this episode are Clark, Chloe, Lois, and Jimmy.
- Chloe and Lois finally get some hanging-out "cousin time" until they are attacked by two thugs. Lois takes one of them down with her stiletto heels (hence the title of the episode?) and begins to feel like a bit of a superheroine herself. The other, however, gets away with Chloe's car which has some very sensitive information inside.
- Lois recruits Jimmy for photography help to convince others that "Stiletto" is Metropolis' newest heroine so she can have the exclusive and then bring the Red-Blue Blur out of hiding. When Clark finds out about this, he tells Lois that she's a better reporter than one who would lie to advance her career.
- Lois may end up having contact with the Red-Blue Blur at some point of the episode.

Source: kryptonsite.com