This dataset contains calibrated, 1.05- to 4.8-micron spectral images of comet 103/P Hartley 2 acquired by the High Resolution Infrared Spectrometer (HRII) from 01 October through 26 November 2010 during the Hartley 2 encounter phase of the EPOXI mission. Version 3.0 includes the application of scaled master dark subtraction for DOY 307 and in scene dark subtraction for DOY 311-313, as well as the use of an average per scan optical bench temperature in the pipeline processing. Version 3 also includes the calibration enhancements implemented in Version 2 of this dataset: a new per-pixel linearity correction treatment and its propagation through the calibration steps (i.e., bad-pixel maps, flat-field file update, revised spectral calibration curve), new mode-dependent master darks, an optimized scaling factor for the master dark, and a refinement in the absolute spectral calibration curve.