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:
| Overall Episode # | Original airdate | Iron Chef | Challenger | Challenger Specialty | Theme Ingredient | Winner |
| --- | --- | --- | --- | --- | --- | --- |
| 1.0 | October 10, 1993 | Yutaka Ishinabe | Takeshi Maruyama (丸山　剛) | Chinese ( Cantonese ) | Salmon | Yutaka Ishinabe |
| 2.0 | October 17, 1993 | Rokusaburo Michiba | Yōsei Kobayakawa (小早川陽青) | French | Foie gras | Rokusaburo Michiba |
| 3.0 | October 31, 1993 | Chen Kenichi | Paolo Indragoli | Italian | Globefish | Chen Kenichi |
| 4.0 | November 7, 1993 | Yutaka Ishinabe | Toshiyuki Kudō (工藤敏之) | French | Tofu | Yutaka Ishinabe |
| 5.0 | November 14, 1993 | Rokusaburo Michiba | Zhou Tomiteru ( 周 富輝 Shū Tomiteru ? ) | Chinese (Cantonese) | Lobster | Rokusaburo Michiba |
| 6.0 | November 21, 1993 | Chen Kenichi | Cheng Kazuhiko ( 程　一彦 Tei Kazuhiko ? ) | Chinese ( Taiwanese ) | Octopus | Cheng Kazuhiko |
| 7.0 | November 28, 1993 | Yutaka Ishinabe | Masato Mutō (武藤正人) | Japanese | Radish | Yutaka Ishinabe |
| 8.0 | December 5, 1993 | Rokusaburo Michiba | Zhou Tomitoku ( 周 富徳 Shū Tomitoku ? ) | Chinese (Cantonese) | Crab | Rokusaburo Michiba |
| 9.0 | December 12, 1993 | Yutaka Ishinabe | Eizō Ōyama (大山栄蔵) | Dessert | Banana | Yutaka Ishinabe |
Question:
What episode number originally aired on November 21, 1993?
Answer:
6.0