The documentary, not yet available on general release, explores the journey Mr Watson has gone through to create Sea Shepherd, and his continuous work defending our oceans.

Onshore volunteer with Sea Shepherd Rhiannon Slaughter said Mr Watson has played a massive role in creating a movement around conservation and the protections of our oceans.

"We have a responsibility to protect our environment and the animals in it, and that's our role," she said.

"It's our responsibility. We share the planet. And if you are feeling a bit helpless in how to make a difference, this is a step in direction to make a difference."

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Ms Slaughter said it can be overwhelming to know where to start when wanting to support conservation movements but things like picking up rubbish, changing your own everyday practices, and changing your participation in activities that could harm the environment are all great ways to start.

"Sea Shepherd is a place to start, and even having conversations is a great place to start."

The event will be held on October 16 at Deloraine's Red Brick Road Cider, with a variety of platters provided by Earthy Eats.

Tickets are $10 and can be purchased online at the Facebook event at "Watson - An exclusive screening", or through Eventbrite. The money from the ticket sales will go to supporting Sea Shepherd and the work they do.

Hobart will also have a screening of the documentary on October 11.