Stephen Graham took home the BAFTA Television Award for leading actor on Sunday night for his performance as Eddie Miller – the beleaguered plumber and father who serves as his 13-year-old son’s “appropriate adult” through a police arrest that will shatter everything his family has built – in “ Adolescence .” The win is Graham’s first BAFTA Television Award in eight nominations, all in the acting categories, a fact Graham noted when collecting his award. “I’ve been nominated eight times and it’s the first time I’ve won,” he told the audience, before adding: “Nice one BAFTA, this is lovely.” He also had a message for any children who might be watching, saying “No matter where you’re from, anything is possible.” Popular on Variety Graham’s was the fourth award of the night after “Adolescence” saw wins for his co-stars Owen Cooper, who played Graham’s son, in the best supporting actor category and Christine Tremarco, who played his wife, for best supporting actress.…