McGarrett and Grover working together? It's not something most viewers ever thought they would witness.

But the Governor ordered this unexpected partnership on Hawaii Five-0 Season 4 Episode 8 in the name of National Security, as a posed threat was far more pressing than the issues between the aforementioned rivals.

How did it all work out? Is this the start of a brand new friendship?

Watch the full episode below by clicking on the photo of these reluctant partners:

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.