All the pickle files (EPIC_test_s1_timestamps.pkl, EPIC_test_s2_timestamps.pkl, EPIC_train_action_labels.pkl and EPIC_train_invalid_labels.pkl) are now pickled with pickle protocol set to 2. This means that python 2.3+ users should be able to read the pickle files.
Reading the pickle files has been tested with python versions 2.7, 3.6.4 and pandas versions 0.22.0, 0.23.1.
If an error still occurs try updating your pandas version.
Additionally, in this release we have released EPIC_video_info.csv which includes information of each video's frame rate, length and fps. More information can be found in the README.