Seb Coulthard and Barry Gray in PBS' "Chasing Shackleton."

Seb Coulthard and Barry Gray in PBS' "Chasing Shackleton." Credit: Ed Wardle

They certainly want to honor Shackleton, but they also want to gauge some inner mettle. It's an admirable impulse, especially to those of us who'd rather ride a couch than an open boat in the southern ocean, but it needs to be more fully explored here. These doughty men, with their frozen beards and frost-lined faces, may be more interesting than the voyage itself -- Jarvis is a particularly fascinating figure. But his, and their, motives remain stubbornly out of reach. As a TV experience, "Chasing Shackleton" can be a bit monochromatic and frigid -- gray on gray, cold on cold -- but a more human touch could have thawed it out.

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