Samaras sent Celtic on their way to a fifth consecutive SPL victory with an overhead kick 16 minutes into a one-sided first half at Dens Park.
Dundee made a game of it after the break and Colin Nish missed a great chance to equalise but Hooper secured the points in the 71st minute when he lobbed Rab Douglas.
Celtic controlled the final stages as they extended their lead at the top of the table after second-placed Inverness were earlier held by St Mirren.
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- Colin Nish