Here's my list of keeper scenes. Probably runs 20 minutes, max, and tells the same story:
Ellis Island 1927.
Jack talking to Angelo in cell (shorten the narrative and get to the document change faster).
Catholic church scene, meet Padre, get wine.
Get nabbed by thugs and agree to move crate.
Gwen needs to talk to Jack downstairs, Ester asks if something's wrong.
Gwen tases Jack.
Crate and creature scene (cut down narrative more...goes on far too long).
Keep 10% of Gwen/Jack in car scenes. Her love of Torchwood isn't relevant. Why babble about it when if she hated it she wouldn't be there. Jack's line about ripping the skin from her skull works.
Jack ditches Angelo. Keep it simple. We didn't need the extended, multiple massacres of Jack scene. We know he can't die. Once or twice, then the trio shows up, would've been plenty.
Ester finds the contact lens info log, they go after Gwen/Jack
Cut down the narrative and waiting for the Nana Visitor (nice to see her again) car scene. Who cares that Jack saw a Firebird once? Did we get to see it? No. We know Jack doesn't want to die, and that he's lived multiple lifetimes (700 years or so) and he's not ready to end yet. Got it, move on.
Keep everything from when the black SUV's pull up through the end.
What's that, about 20-25 minutes? It's taught, more suspenseful, moves along better and tells the same story...