Hellboy - Darkness Calls 01 (of 06) (2007) (digital) (Son of Ultron-Empire)

Hellboy - Darkness Calls 02 (of 06) (2007) (digital) (Son of Ultron-Empire)

Hellboy - Darkness Calls 03 (of 06) (2007) (digital) (Son of Ultron-Empire)

Hellboy - Darkness Calls 04 (of 06) (2007) (digital) (Son of Ultron-Empire)

Hellboy - Darkness Calls 05 (of 06) (2007) (digital) (Son of Ultron-Empire)

Hellboy - Darkness Calls 06 (of 06) (2007) (digital) (Son of Ultron-Empire)

Hellboy - Darkness Calls - Epilogue (2008) (digital-Empire)