Step 1: Select rows where 'directed_by' is 'paul holahan'.

no_in_series	no_in_season	title	directed_by	written_by	us_viewers__million_	original_air_date	production_code
47	1	wanted	paul holahan	jeff eastin	3.21	2012-07-10	bcw401
48	2	most wanted	paul holahan	mark goffman	2.98	2012-07-17	bcw402
49	3	diminishing returns	stefan schwartz	jim campolongo	3.01	2012-07-24	bcw403
50	4	parting shots	robert duncan mcneill	alexandra mcnally	2.82	2012-07-31	bcw404
51	5	honor among thieves	arlene sanford	joe henderson	2.93	2012-08-14	bcw405
52	6	identity crisis	david straiton	channing powell	3.89	2012-08-21	bcw406
53	7	compromising positions	paul holahan	matthew negrete	3.36	2012-08-28	bcw407
54	8	ancient history	russell lee fine	daniel shattuck	3.38	2012-09-04	bcw408
55	9	gloves off	renny harlin	mark goffman	3.8	2012-09-11	bcw409
56	10	vested interest	russell lee fine	jeff eastin	3.41	2012-09-18	bcw410
57	11	family business	paul holahan	joe henderson	2.77	2013-01-22	bcw411
58	12	brass tacks	anton cropper	jim campolongo & alexandra mcnally	2.61	2013-01-29	bcw412
59	13	empire city	tim dekay	channing powell & daniel shattuck	2.28	2013-02-05	bcw413
60	14	shoot the moon	russell lee fine	matthew negrete & bob derosa	2.42	2013-02-19	bcw414
61	15	the original	john kretchmer	mark goffman	2.12	2013-02-26	bcw415

Step 2: Extract the numerical value from the 'no_in_season' column then add column 'season' to existing table.

Step 3: Select rows where 'season' is less than or equal to 6.

Step 4: Use a `CASE` statement to return TRUE if the number of rows is equal to the total number of rows in the table, otherwise return FALSE.