Still on Patrol: The Hunt for Hitler's U-Boat 215 (2005, The Sea Hunters, Documentary)

Real-life adventures into the depths of World War II. Join bestselling action-adventure author Clive Cussler, renowned maritime archaeologist James Delgado, and their crack team of divers to explore some of the most significant shipwrecks of World War II.

In one of their most challenging dives, the Sea Hunters brave seven-knot currents of the Georges Bank to look for the mysterious, missing U-215. Could it be the same German sub that sank the Liberty ship Alexander Macomb in the early months of World War II before succumbing to British depth charges?

Alex4History's supplementary notes:
From "The Sea Hunters: Relics of WWII" documentary series.

https://uboat.net/boats/u215.htm

https://en.wikipedia.org/wiki/German_submarine_U-215

https://en.wikipedia.org/wiki/SS_Alexander_Macomb