user: Question: What is the production code for episode number 86 in the series?
Columns: ['No. in series', 'No. in season', 'Title', 'Directed by', 'Written by', 'Original air date', 'Production code']
Types: ['real', 'real', 'text', 'text', 'text', 'text', 'real']
Sample row: [73.0, 1.0, '"Surely You Joust"', 'John Tracy', 'Fred Fox, Jr. & Jim Geoghan', 'September 18, 1992', 447801.0]
SQL:

assistant: SELECT "Production code" FROM "Table" WHERE "No. in series" = 86.0;