Continuing the series into college, Saved by the Bell: The College Years shows most of the cast transplanted into not only the same college, but also the same college dormitory, where Screech continued his typical misadventures. The College Years was canceled after one season. Diamond returned to Bayside High as Principal Belding's assistant in The New Class episodes, remaining with the show until its cancellation.
In 2001, Diamond released the video Dustin Diamond Teaches Chess in which he shows various techniques for becoming a better chess player. It is punctuated by appearances by Diamond, in various costumes, such as dressing as Screech, Liberace and Al Jolson-style black face.
Diamond returned for the sixth season Boot Camp edition of the show, joining a team of "Second Chancers" that includes Toccara Jones, Tina Yothers, and Willie Aames where he gained 30 lbs back to his starting weight at 217 lbs. Diamond appeared to be trying to follow the show's program, in a marked contrast to his behavior during the previous season, and was named team captain. However, the judges remained skeptical of him. Sgt. Walden openly questioned the decision to name him captain (saying Yothers should have been his choice) and another judge said that she was "waiting for the other shoe to drop" regarding his behavior. When Diamond didn't show up for a day of work, claiming he was stranded at an airport by bad weather, Walden "fired" him as team captain and named Jones the new leader. While Diamond and Walden clashed again the following week when Walden called Diamond a "Nazi", Diamond ultimately stayed put and held his own for the Second Chancers. Later on the season he and Tina Yothers were traded to the Newbie team. Diamond lost 23 lbs on the show, with a total of 194 lbs. His team won the grand prize.
Diamond has had trouble as a result of failing to show for a scheduled performance. Diamond was scheduled to appear at the University of Connecticut to give a stand-up comedy performance followed by a meet and greet on Thursday, February 8, 2007, but did not appear. According to Diamond's agent, Roger Paul of Roger Paul Management LLP, he failed to board his plane. All of the tickets purchased by students were refunded and Diamond, having breached his contract, did not receive any payment.
In July 2008, Diamond signed a deal with Gotham Books to write a tell-all book about the "sexual escapades among cast members, drug use, and hardcore partying" during his stint on Saved By the Bell.
In 2004, the case was submitted to the National Arbitration Forum acting on behalf of the Internet Corporation for Assigned Names and Numbers (ICANN). Diamond ultimately lost the suit. The decision read, in part, "The Panel accepts Respondent’s argument that the "outrageous ugly and low-tech graphics and numerous errors and misspellings" as well as the sheer absurdity of the site’s claim that Dustin Diamond is a "Famous Superstar and Sex Symbol", clearly signal that the site is not meant to be taken seriously. Goldberg offered, in court, to produce various letters of support, confirming public understanding of the website's humor, including letters from a Professor of Cinema Studies who coauthored two well-known books of religious parody among other publications, and a letter from an art correspondent for the Wall Street Journal, New York Times, and the Oxford American. These writers called the website "an electronic art installation of great wit and outstanding merit," a "parody," and an "obvious and clearly affectionate joke." Whether the site is regarded as parody, satire, or critical commentary, and notwithstanding Respondent’s assertion that "lawyers are notoriously bad at understanding how humor works,” this Panel finds that legitimate noncommercial fair use commentary is involved. Goldberg, then 21, represented himself through the suit.
The precedent-setting decision may be the first time that a celebrity has lost a domain name dispute to a non-commercial parody site.
On June 13, 2006, Diamond appeared on The Howard Stern Show stating that he was given 30 days to come up with US$250,000 or risk losing his Port Washington, Wisconsin, home for failing to make payments on his land lease. Diamond said he blamed Arthur Giraldo, a mortgage broker for New York Capital Exchange, who Diamond claims "screws over the working man then laughs at their expense". Diamond decided to sell t-shirts for $15 that had "I paid 15 dollars to help Screeech [sic] save his house" emblazoned on the front. He said that he would need to sell 30,000 t-shirts to completely cover the costs. He explained the extra 'e' in Screeech was needed because of copyright laws, since he does not own the rights to the name or character.
On August 14, 2006, Diamond was scheduled for an online television telethon, in an effort to raise funds to prevent the foreclosure on his house. His broadcast was canceled less than 90 minutes before it was to be aired live, as an executive at the startup online television network claimed that the foreclosure story lacked credibility, and that Diamond had "exhibited some really strange and obnoxious behavior.
On September 2, 2006, Mike Nichols, the Ozaukee County columnist for the Milwaukee Journal Sentinel said in an article that Diamond was a fraud and the whole story about Diamond losing his house was a publicity stunt. On October 7, a follow-up article stated in interviews with several people that they had not received t-shirts after months of waiting, corroborating the alleged fraudulence.
On November 16, 2007, Diamond appeared on Mancow Morning Madhouse and admitted he was never destitute, but his mortgage broker had tried to rip him off.
| Year | Title | Role | Other notes |
|---|---|---|---|
| 1987 | The Price of Life | Young Stiles | |
| American Playhouse | Young Stiles | TV, 1 episode | |
| It's a Living | Young Sonny | TV, 1 episode | |
| Yogi's Great Escape | Chubby Kid (Voice) | TV, 1 episode | |
| 1988 | Big Top Pee-wee | Deke | |
| Purple People Eater | Big Z | ||
| 1988-1989 | Good Morning, Miss Bliss | Samuel "Screech" Powers | TV, 13 episodes |
| 1989 | She's Out of Control | Beach boy | |
| 1989-1990 | The Wonder Years | Joey | TV, 2 episodes |
| 1989-1993 | Saved by the Bell | Samuel "Screech" Powers | TV, 82 episodes |
| 1990 | The Munsters Today | Rob | TV, 1 episode |
| 1992 | Star Trek: The Next Generation | Greeter | TV, 1 episode |
| Saved by the Bell: Hawaiian Style | Samuel "Screech" Powers | ||
| 1993 | Getting By | Tommy | TV, 2 episodes |
| 1993-1994 | Saved by the Bell: The College Years | Samuel "Screech" Powers | TV, 18 episodes |
| 1994 | Saved by the Bell: Wedding in Las Vegas | Samuel "Screech" Powers | |
| 1994-2000 | Saved by the Bell: The New Class | Samuel "Screech" Powers | TV, 67 episodes |
| 2000 | Longshot | Waiter | |
| 2001 | Made | Himself | |
| 2002 | Jane White Is Sick & Twisted | Simone | |
| Big Fat Liar | Wolf Party Guest | ||
| The Rerun Show | Doctor | TV, 1 episode | |
| 2003 | Pauly Shore Is Dead | Himself | |
| Dickie Roberts: Former Child Star | Himself | ||
| 2005 | Duck Dodgers | Xainius the Eternal | TV, 1 episode |
| 13th Grade | Corey | ||
| 2008 | Our Feature Presentation | Mr. Renolds | |
| 2009 | Hamlet A.D.D. | Bernardo | Post-production |