who played the above mentioned characters?
Tom Welling and Erica Durance, respectively.
Introduction
. "Smallville", which ended its tenth and final season on May 13, 2011, follows Clark Kent (Tom Welling) in the fictional town of Smallville, Kansas, before he becomes the Man of Steel. The first four seasons focus on Clark and his friends in high school. After season five "Smallville" ventures into adult settings, eventually focusing on his career alongside Lois Lane (Erica Durance) at the "Daily Planet" and introducing other DC comic-book superheroes and villains.
when does clark meet lois lane in smallville Season 4
Clark Kent by Tom Welling and Lois Lane by Erica Durance. Erica Durance Erica Durance.
Smallville Lois Lane (Smallville) Lois Lane (Smallville)
Introduction Introduction Introduction
 After "Smallville"s fifth season, The WB and UPN merged to form The CW, the series' later United States broadcaster. "Smallville", which ended its tenth and final season on May 13, 2011, follows Clark Kent (Tom Welling) in the fictional town of Smallville, Kansas, before he becomes the Man of Steel. The first four seasons focus on Clark and his friends in high school. After season five "Smallville" ventures into adult settings, eventually focusing on his career alongside Lois Lane (Erica Durance) at the "Daily Planet" and introducing other DC comic-book superheroes and villains. Lois Lane is a fictional character on the television series "Smallville"; she was portrayed continually by Erica Durance  Lois Lane is a fictional character on the television series "Smallville"; she was portrayed continually by Erica Durance
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Smallville [SEP] Introduction
Over ten seasons the series averaged about 4.34 million viewers per episode, with season two the highest-rated at 6.3 million. By the end of its run, "Smallville" passed "Stargate SG-1" as the longest-running North American science-fiction series by episode count. Since its first season, the series received accolades ranging from Emmys to Teen Choice Awards. "Smallville" spawned a series of young-adult novels, a DC Comics bimonthly comic-book, soundtrack recordings and series-related merchandise. All ten seasons are available on DVD in regions 1, 2 and 4. After the series finale in 2011, the story resumed in comic-book form starting in April 2012.