Complex sentence: Andrew returns to Wolfram & Hart for help, and Angel Investigations rescues Spike, captures Dana, and is then forced to hand her over to Andrew after several Slayers arrive to take possession of her.
Split into simpler sentences: Andrew returns to Wolfram & Hart for help, and Angel Investigations rescues Spike and captures Dana. However, Angel is forced to hand Dana over to Andrew after several Slayers arrive to take possession of her.