[s1e20] The Siege: Part 2 -

The tide seemingly turns when Colonel Dillon Everett arrives with a company of Marines and heavy artillery originally intended for Earth's battlecruisers. This military reinforcement brings hope in the form of:

The "cavalry" isn't without its costs. Colonel Everett immediately clashes with Dr. Elizabeth Weir and John Sheppard, holding a personal grudge against Sheppard for the death of Colonel Marshall Sumner. [S1E20] The Siege: Part 2

A new Deep Space Carrier carrying a recovered Zero Point Module (ZPM) that could finally power the city's shields. The tide seemingly turns when Colonel Dillon Everett