Smallville Home Release

Seasons one through nine have been released on DVD in Region 1 and 2, while only seasons one through eight have been released in Region 4. Seasons five and six were also released in the now obsolete HD DVD format on November 28, 2006, and September 18, 2007, respectively. Seasons six, seven, eight, and nine have also been released on Blu-ray formats. The DVD releases include commentary by cast and crew members on selected episodes, deleted scenes, and behind-the-scenes featurettes. The promotional tie-ins, Chloe Chronicles and Vengeance Chronicles, accompanied the season two, three, and five box sets respectively. Other special features include interactive functionality such as a tour of Smallville, a comic book, and DVD-ROM material.

Smallville Merchandise

Since Smallville first began airing, an array of merchandise tying into the series has been released. Two soundtrack albums have been released compiling various songs that appeared on the show. On February 25, 2003, Smallville: The Talon Mix was released featuring a selected group of artists that licensed their music to the show. Following that release, on November 8, 2005, Smallville: The Metropolis Mix was released featuring another select group of artists. Apart from the soundtracks encompassing various songs from the series' episodes, there have been action figures, T-shirts, hats, and posters created and marketed. In December 2002, select, autographed Smallville merchandise was placed up for auction on eBay, with the proceeds going toward charity. In 2003, Titan publishing began releasing the Smallville magazine. It is a monthly magazine featuring interviews with the cast and crew, information on Smallville merchandise, and photos. Titan released the 34th issue of the Smallville magazine in November 2009, and touted it as the final issue.
In addition to the magazine, Titan Books also began publishing companion books for each of the seasons. On September 1, 2004, Titan Books released their first official companion for the series. Written by Paul Simpson, the book contains interviews with the cast and crew as they discuss the production of each episode and working together; the book also contains a sixteen pages of color photos of the cast. On March 1, 2005, Titan Books released their official companion for season two. Paul Simpson steps back into the writer's spot, again collecting interviews with the cast and crew, and supplying sixteen pages of color photos; in addition, the season two companion goes into more detail about the special effects used on the show. On September 1, 2005, Titan Books released the third season official companion. Paul Simpson picks up the writing duties for a third and final time with the season three companion, which continues to provide interviews with the cast and crew about the production. Apart from the episode's general plots, Simpson discusses the lack of use with the character of Martha Kent, and why the Adam Knight storyline did not pan out. After two years, Titan Books released the fourth season companion on September 4, 2007. This time, Craig Byrne was given the responsibility of writing the companion book. The season four book contains interviews with the cast and crew, but this time the color spread contains images of the production itself. A few months later, on December 26, 2007, Titan Books released another companion, this time for season five. Craig Byrne returned to the write the book, which contains the standard interviews, episode descriptions, and color spread as the previous four. On March 25, 2008, Titan Books released their sixth official companion for Smallville. For the third time Craig Byrne takes on the duties of writing the book. The season six companion contains an introduction from Justin Hartley, as well as the cast and crew interviews and sixteen pages of photos.
In 2010, a role playing game was released by Margaret Weis Productions using their Cortex System. It uses the setting of the show in season nine, with rules (and a planned supplement) for earlier seasons. Players can play the characters from Smallville, or create their own spin-off of the show that has as much or as little connection to the show as they like.

Smallville Spin-offs

Smallville creators Al Gough and Miles Millar developed an Aquaman pilot for The WB, with Justin Hartley as Aquaman/Arthur Curry. As work progressed on the Smallville season five episode "Aqua", the character was recognized to have potential for his own series, even though the episode was never meant to be a backdoor pilot for an Aquaman television spin-off. Alan Ritchson was not considered for the role in the new series, because Gough and Millar did not consider it a spin-off from Smallville. Gough said in November 2005, "[The series] is going to be a different version of the 'Aquaman' legend." Gough did express the idea of a crossover with Smallville at some point. The pilot was considered to have a good chance of being picked up, but when The WB and UPN merged into The CW, the resulting network passed on the show.
During the sixth season, there was initial talk about spinning off the Green Arrow into his own series. Hartley refused to talk about the possibility of a spin-off out of respect for his role on Smallville. The actor felt it was his duty to respect what the show had accomplished in five seasons, and not "steal the spotlight" by thinking he was better than he was just because there was "talk" of a spin-off after only two appearances on the show. According to Hartley, "talking" was as far as the spin-off idea ever got.

Smallville Promotional Tie-ins

For the season three premiere, the Smallville producers teamed up with Verizon to provide registered users a chance to view plot updates—in the presentation of a press release from The Daily Planet—as well as quizzes and games related to the show. As part of the deal, Verizon products and services were placed in various episodes of the show. In a promotional tie-in with Sprint, Smallville Legends: The Oliver Queen Chronicles was released dictating the early life of Oliver Queen in a six-episode CGI series. According to Lisa Gregorian, Executive Vice President of worldwide marketing at Warner Bros. Television Group, explained these promotional tie-ins are ways to get fans more connected to the show. On April 19, 2007, a tie-in with Toyota, promoting their new Yaris, featured an online comic strip as interstitial programs, during new episodes of Smallville, titled Smallville Legends: Justice & Doom. The interactive comic was based on the episode "Justice", which follows the adventures of Oliver Queen, Bart Allen, Victor Stone, and Arthur Curry as they seek to destroy all of LuthorCorp's secret experimental labs. The online series allowed viewers to investigate alongside the fictional team, in an effort to win prizes. Stephan Nilson wrote all five of the episodes, while working with a team of artists for the illustrations. The plot for each comic episode would be given to Nilson as the production crew for Smallville was filming their current television episode. Artist Steve Scott would draw comic book panels, which would be sent to a group called Motherland. That group would review the drawings and tell Scott which images to draw on a separate overlay. This allowed for multiple objects to be moved in and out of the same frame.
In 2008, The CW entered into a partnership with makers of the Stride brand of chewing-gum to give viewers the opportunity to create their own Smallville digital comic. The writers and producers developed the comic's beginning and end, but are using the viewers to provide the middle. The CW began their tie-in campaign with the March 13, 2008 episode "Hero", where Pete develops superhuman elasticity after chewing some kryptonite-infused Stride gum. Going to The CW's website, viewers vote on one of two options—each adds four pages to the comic—every Tuesday and Thursday until the campaign officially ended on April 7, 2008. For season seven, Smallville teamed-up with Sprint again to bring Sprint customers "mobisodes" featuring Clark's cousin Kara.