 The series finale episodes #9.19 and #9.20, The Truth, parts 1 & 2  featured the Largest number of cast members in the opening credits  sequence: David Duchovny (qv) (Fox Mulder),  Gillian Anderson (I) (qv) (Dana Scully), Robert Patrick (I) (qv)  (John Doggett), Annabeth Gish (qv) (Monica Reyes), and  Mitch Pileggi (qv) (Walter Skinner), totaling 5.