Complex sentence: In the meanwhile the Doctor and his party makes it to the Shangri-La to set up a defence gettingBilly rigs up the Shangri-La sound system to amplify the perfectly pitched scream of the Chimeron child Princess--a sound which is excrutiatingly painful to Bannermen.
Split into simpler sentences: In the meanwhile, the Doctor and his party made it to Shangri-La to set up a defence. Billy rigged up the Shangri-La sound system to amplify the perfectly pitched scream of the Chimeron child Princess--a sound which is excruciatingly painful to Bannermen.