Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Number in series | Number in season | Title | Directed by | Original air date | Production code |
| --- | --- | --- | --- | --- | --- |
| 26.0 | 1.0 | "The Case of the Mystery Weekend" | Bill Schreiner | September 21–25, 1992 | 50021–50025 |
| 27.0 | 2.0 | "The Case of the Smart Dummy" | Bill Schreiner | September 28–October 2, 1992 | 50231–50235 |
| 28.0 | 3.0 | "The Case: Off the Record" | Bill Schreiner | October 5–9, 1992 | 50011–50015 |
| 29.0 | 4.0 | "The Case of the Bermuda Triangle" | Jesus Salvador Treviño | October 12–16, 1992 | 50251–50255 |
| 30.0 | 5.0 | "The Case of the Piggy Banker" | Bill Schreiner | October 19–23, 1992 | 50241–50245 |
Question:
What is the series number that has a production code of 50021–50025?
Answer:
26.0