Thank you to Victoria Parsons for her picture of the Eleventh Doctor (played by Matt Smith) and the TARDIS.
This is Sherri (stolen from her Twitter profile, sorry Sherri), so you may gauge Jack’s likeness.
EAC stands for East Australian Current and is from the film Finding Nemo (which Jack and his brothers watched at the weekend). The turtles in it ride it across the Ocean. It really does exist! Jack learns something new again, thanks for that!