He crossed the Isthmus and then built himself a small boat, and he terrorised Spanish shipping in the Pacific briefly before heading back across the Isthmus.
It then casts back to the 1960s, when David was first terrorised by Giles at school, and inches forward, tracing David's sexual awakening and stuttering rise as an actor.
Aside from terrorising the local population, they left a linguistic mark on the English language, and words such as husband, sky, and skull come from the Norse languages spoken by the Vikings.