Smallville (2001–2011)
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Clark once again becomes "under the influence" of red kryptonite, and will say his true feelings on such things as Lionel and Martha's relationship, and Lana's pregnancy, but there may be someone else that will get affected by the red k.


Glen Winter


Jerry Siegel (character created by: Superman), Joe Shuster (character created by: Superman) | 4 more credits »

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Episode cast overview:
Tom Welling ... Clark Kent
Kristin Kreuk ... Lana Lang
Michael Rosenbaum ... Lex Luthor
Erica Durance ... Lois Lane
Allison Mack ... Chloe Sullivan
John Glover ... Lionel Luthor (credit only)
Annette O'Toole ... Martha Kent
Aaron Ashmore ... Jimmy Olsen
Simone Bailly ... Star
Fred Henderson ... Dr. Langston
Julie Brar ... Dinner Guest #1
Noel Johansen ... Dinner Guest #2
Judith Johnson Turner Judith Johnson Turner ... Dinner Guest #3
Marshall Caplan Marshall Caplan ... Dinner Guest #4
Allan Gray ... Dinner Guest #5


On Valentine's Day, after Lois tries on lipstick made with red kryptonite, she becomes overwhelmed with desire for Clark and makes her move. The two share a kiss, transferring the red kryptonite to Clark and his inhibitions immediately shut down causing "bad Clark" to emerge. Fueled by the red rock, Clark decides to break up Lex and Lana's wedding dinner and kidnap the bride-to-be. But only Chloe senses what is really going on with Lois and Clark, and she asks Jimmy to help her find a way to stop 'bad Clark' as well as Lois. Written by Anonymous

Plot Summary | Add Synopsis


TV-14 | See all certifications »






Release Date:

1 February 2007 (USA) See more »

Company Credits

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Technical Specs


Sound Mix:




Aspect Ratio:

1.78 : 1
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Did You Know?


Jimmy jokes that aphrodisiacs work like "Barry White songs", a reference to the American singer famous for his sensual soul and disco love songs. See more »


As she gives Clark the mixed CD, Lois says, "Most people don't think Whitesnake sing power ballads, but they do." However, there isn't a single Whitesnake song listed on the CD. See more »


Lex Luthor: Clark, I think maybe it's time for you to leave!
Clark Kent: I am not done yet! Besides, I haven't given you my gift.
[reaches inside his coat and pulls out a rattle, he tosses it to Lex]
Clark Kent: To baby Luthor. The real reason Lana's marrying you!
See more »


References Superman IV: The Quest for Peace (1987) See more »


Our Finest Hour
by Ginger
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User Reviews

11 April 2011 | by ColcatronSee all my reviews

This is my favorite of all of the Red Kryptonite episodes. Smallvile established the rule that Red K takes away Clark's inhibitions, which several episodes have gone too far with. "Crimson" sticks closer to the rule that Clark would act on and say things that would already be on his mind, even if out character. Season 3 I think went too over the top, with Clark stealing and breaking laws, which I always felt was too much of a stretch for a future Superman. I'd rather see Clark acting like a jerk than as a flat out villain, which several Red K episodes did to him in the past. This time the worst that Clark does on Red K is insult and call out all of the other characters, Lex, Lana, Martha and Chloe, on things that as an audience member you've already questioned. Even though Clark is going out of his way to be as confrontational and hurtful as possible, he doesn't say anything that's untrue. Again, unlike how season 3 handled Red K episodes, "Crimson" doesn't get too dark, but instead keeps the story flowing in a fun, entertaining and sometimes humorous way.

While most Smallville seasons start off very strong and slow down considerably in the 2nd half, season 6 does the opposite. The first 9 episodes were mostly throw-aways, and Crimson marks the 4th straight classic episode in my opinion. Up until this point I had felt that the Lex/Lana/Clark love triangle was most interesting than most have felt, although I can admit that too little was happening. By the end of Crimson the story progression is really sped up, and actually left me quite interested in seeing how it continued.

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