CREATE TABLE table_name_74 (episode INTEGER, date VARCHAR(255), performer_1 VARCHAR(255), performer_3 VARCHAR(255))
Performer 1 of greg proops, and a Performer 3 of ryan stiles, and a Date of 25 august 1995 is which average episode?
    
SQL: SELECT AVG(episode) FROM table_name_74 WHERE performer_1 = "greg proops" AND performer_3 = "ryan stiles" AND date = "25 august 1995"