Greyhound is watchable but entirely fanciful.

Tom Hanks is a Captain of a destroyer taking on the u-boat menace. He's fearless, god fearing, modest and faces down hordes of u-boats who are out to get him.

The enemy goads him, sends u-boats to face off with destroyers in 18th century style exchanges and sails around on the surface following his floatilla, in open defiance.

Now for an injection of reality. U-boats did not take on destroyers in surface battles of the kind you see in this film. They did not goad their captains (and records show they took no pleasure in the job they di... read the rest.