4.05 Monster Movie

Lars Kurz - Bratwurst Polka A (Sonton)
plays when Sam and Dean arrive at Oktoberfest

Mühlviertler Musikanten & Werner Brüggemann - Hofkirchner Polka (Sonoton)
plays while Sam and Dean talk to Ed Brewer; Dean has a beer while he and Sam talk

Matthias Seuffert - Münchener Bierfest (a) (KPM Music)
plays while Dean first asks Jamie out

Gerhard Narholz - Alpine Polka (Sonoton)
plays while Sam and Dean talk about the case and then Jamie lets Dean know she's free that night

4.07 It's the Great Pumpkin, Sam Winchester

Triple 7 - Bomb
plays at the crypt Halloween party when Samhain arrives

4.08 Wishful Thinking

Howell-Freundlich Overdrive - Friday Night (Wild Whirled Music)
plays in the restaurant when Sam asks Dean about Hell

4.14 Sex and Violence

Classic - Come on Shake
plays while Dean and Nick Munroe watch Dr. Roberts

4.15 Death Takes a Holiday

George Highfill & Jai Josefs - Perfect Situation for a Fool (MasterSource)
plays in the beginning as the two men leave the bar

4.18 The Monster at the End of This Book

Sonny Ellis - Leave All This Behind
plays while Sam and Dean discuss Lilith in the diner

4.22 Lucifer Rising

Juliana Wimbles - Patty Cake
sung by Cindy McLellan