user: Question: What was the actual title of the show that had an issue number less than 508, was written by Desmond Devlin, and for which Tom Richmond was the artist?
Columns: ['Spoofed Title', 'Actual Title', 'Writer', 'Artist', 'Issue']
Types: ['text', 'text', 'text', 'text', 'real']
Sample row: ['The Big Bomb Theory', 'The Big Bang Theory', 'Desmond Devlin', 'Tom Richmond', 503.0]
SQL:

assistant: SELECT "Actual Title" FROM "Table" WHERE "Artist" = 'Tom Richmond' AND "Issue" < 508.0 AND "Writer" = 'Desmond Devlin';