Three activists aboard a security vessel attract media attention that captain Paul Watson hopes will work in Sea Shepherd's favor; the Steve Irwin crew is engaged in a violent confrontation.
A helicopter's fate is unknown after being sent out to identify a mystery vessel picked up on Sea Shepherd's radar.
In the Season 5 finale, Sea Shepherd's months-long search for the Nisshin Maru finally pays off, but the factory ship is well-protected and won't give up without a fight.
Paul Watson has to step down as captain due to legal troubles, so a new commander must take over to guide the Sea Shepherds' "Zero Tolerance" mission in 2012.
In the Season 7 premiere, the Sea Shepherd Conservation Society's 10th anti-whaling campaign gets underway in the Antarctic with Peter Hammarstedt in charge in place of Paul Watson.
An oncoming storm and disobedient crew members test Peter Hammarstedt's ability to lead his first campaign as they get closer to Japanese harpoon ships.
A collision on the open sea between the Bob Barker and a Japanese harpoon ship forces the Sea Shepherds to track the whaling fleet by helicopter, but hope fades when blizzard conditions block communications and freeze instruments.
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