Every family has one member who looms just a tad larger -- the uncle who fought the fascists, the grandmother who marched with Dr. King. Their stories become the fabric from which family legends are woven. In actor Joseph Fiennes’ family, his cousin Ran Fiennes’ stories took on mythical proportions, as well they should. Ran (pictured above and below, opposite Fiennes) is a genuine explorer: He circumnavigated the globe and discovered a lost city in Oman. Joseph, seen most recently in Hulu’s The Handmaid’s Tale, wanted an adventure with Sir Ranulph Twisleton-Wykeham-Fiennes, in part to see if any of that derring-do was in his DNA. The result is a charming three-part travelogue and delightful buddy film – if tunneling through ancient catacombs with a knight can be called such.