Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_20420 ( "Episode Number" real, "Air Date" text, "Guest Host" text, "Musical Guest (Song performed)" text, "Who knows the most about the guest host? panelists" text )

### Question ###
On what date were Gary Lucy and Susie Verrico the panelists.

### Accurate SQL ###

SELECT "Air Date" FROM table_20420 WHERE "Who knows the most about the guest host? panelists" = 'Gary Lucy and Susie Verrico'