Jesse Voccia - "Bosch" Varese Sarabande Records; Soundtrack - Bosch is the exciting series based on the best-selling novels by Michael Connelly. Starring Titus Welliver as LAPD detective Hieronymus "Harry" Bosch. The soundtrack features the series theme song "Can't Let It Go" performed by Caught A Ghost, as well as the score from both season one and two, composed by Jesse Voccia (Escape from Planet Earth, The Proposal, Sex and the City).