In 1987, Seagal began work on his first film, Above the Law (titled Nico in Europe), with director Andrew Davis and reportedly as a favor to a former aikido student, the agent Michael Ovitz. Ovitz took Seagal to Warner Brothers to put on an aikido demonstration and the executives were impressed by him and offered him several scripts; Seagal turned them down but agreed to write what would become Above the Law. Following its success, Seagal's subsequent movies were Hard to Kill, Marked for Death, and Out for Justice, all box office hits, making him an action hero. Later, he achieved wider, mainstream success in 1992 with the release of Under Siege (1992). That film reunited Seagal with director Andrew Davis, and was a blockbuster in the U.S. and abroad, grossing $156.4 million worldwide.  Seagal hosted the April 20, 1991 episode of the late night variety show Saturday Night Live, which aired as the 18th episode of the 16th season. Cast member David Spade regarded Seagal as the show's worst host during Spade's time there. Spade and co-star Tim Meadows cite Seagal's humorlessness, his ill treatment of the show's cast and writers, and his refusal to do a "Hans and Franz" sketch because that skit's title characters stated that they could beat up Seagal. Seagal was never invited back to the show following that episode. Meadows commented, "He didn't realize that you can't tell somebody they're stupid on Wednesday and expect them to continue writing for you on Saturday." The cast and crew's difficulties with Seagal were later echoed on-air by producer Lorne Michaels during guest host Nicolas Cage's monologue in the September 26, 1992 Season 18 premiere. When Cage worried that he would do so poorly that the audience would regard him as "the biggest jerk who's ever been on the show", Michaels replied, "No, no. That would be Steven Seagal."  Seagal directed and starred in On Deadly Ground (1994), featuring Michael Caine, R. Lee Ermey and Billy Bob Thornton in minor supporting roles. The film emphasized environmental and spiritual themes, signaling a break with his previous persona as a genre-ready inner-city cop. On Deadly Ground was poorly received by critics, especially denouncing Seagal's long environmental speech in the film. Regardless, Seagal considers it one of the most important and relevant moments in his career. Seagal filmed a sequel to one of his most successful films, Under Siege, titled Under Siege 2: Dark Territory (1995), and cop drama The Glimmer Man (1996). In 1996, he had a role in the Kurt Russell film Executive Decision, portraying a special ops soldier who only appears in the film's first 45 minutes. In another environmentally conscious and commercially unsuccessful film, Fire Down Below (1997), he was an EPA agent fighting industrialists dumping toxic waste in the Kentucky hills. This film ended his original multi-picture contract with Warner Bros.

Answer this question "What other work did he do at this time?" by extracting the answer from the text above.
Saturday Night Live,