1. Introduction  
2. SPHerIC Survey  
2.1. Planck/HFI Selection: The PHz Sample  
2.2. Herschel/SPIRE Observations  
2.3. Spitzer/IRAC Target Selection  
3. Data  
3.1. Observations  
3.2. Source Extraction and Photometry  
4. Planck/Herschel Highly Star-Forming Sources as Seen by Spitzer  
5. Discussion  
5.1. Photometric Redshift Distribution  
5.2. Color-Magnitude Diagrams  
5.3. Density Maps  
5.4. Halo Masses of the SPHerIC Candidates  
6. Conclusions