Question: What series 1 has a Doug Richards in Series 2?
SQL: SELECT "Series 1" FROM "2-12617978-2" WHERE "Series 2" = 'Doug Richards';

Question: Who in series 1 corresponds with Peter Jones in series 5?
SQL: SELECT "Series 1" FROM "2-12617978-2" WHERE "Series 5" = 'Peter Jones';

Question: Who in series 5 corresponds to Deborah Meaden in series 3?
SQL: SELECT "Series 5" FROM "2-12617978-2" WHERE "Series 3" = 'Deborah Meaden';

Question: Who in series 11 corresponds to Peter Jones in series 1?
SQL: SELECT "Series 11" FROM "2-12617978-2" WHERE "Series 1" = 'Peter Jones';

Question: Who in series 9 corresponds to Peter Jones in series 2?
SQL: SELECT "Series 9" FROM "2-12617978-2" WHERE "Series 2" = 'Peter Jones';