BioShock Infinite

This theater is like all the others (meaning it has 15 rounds) just amped up with tougher enemies
there is a wave with two handymen but if you upgraded charge (invulnerable after a charge for a few seconds cost 4000) just keep hitting them and that wave should be a breeze
The 15th wave includes a Siren (Ghost that resurrects enemies) just continue to pursue her and charge her. When the wave begins the challenge is throwing the bodies off of Columbia before she resurrects anyone so if you do that (use undertow when the airship drops the dead bodies) she will just fly away from you constantly.
If you die just select continue with current level and you will respawn on the same level with the same amount of enemies you died with
so all in all not that difficult just keep charging
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Good luck and Happy Hunting