What's That Sound? (BarneyBJBabyBopandRiffFan's Version)

'''What's That Sound? '''is the first episode of a mini season to promote Season 4. It first aired April 5, 1997.

Plot

When their are strange noices, Detective BJ is on the case!

Cast Songs
 * Barney
 * BJ
 * Maria
 * Hannah
 * Carlos
 * Stephen
 * Stephen's Dad
 * 1) Barney Theme Song
 * 2) Listen
 * 3) People Helping Other People
 * 4) Five Senses Song
 * 5) The Airplane Song
 * 6) Here Comes the Firetruck
 * 7) Over in the Meadow
 * 8) The Marching Song
 * 9) I Love You