The best two on last night were:

Impulse

Enterprise finds a Vulcan ship where all 140 crew members act and even look like vicious zombies from hell.

It was pretty cool watching Archer, T'Pol and a few others fight them off until They could be rescued by a shuttle pod from Enterprise.

It turns out that the crew of Impulse had gone cuckoo for Cocoa Puffs because of an element that occured naturally in nearby asteriods; they could not be cured, but when T'Pol got the same disease, Dr. Phlox was able to make her well again because she had not been exposed to the element as long as the other Vulcans had.

Twilight

Archer is hurt by an anomaly that passes through the ship; his memory is affected. Every day he wakes up and thinks it is the day after he got hurt again.

The Zindi blow up Earth; he and the last 6,000 surviving humans settle on a planet until the Zindi find and begin to exterminate them.

Archer is taken by Dr Phlox to Enterprise where a cure for his problem is discovered... radiation from the ship's warp engines can cure him.

Before the treatments are done, the Zindi attack Enterprise. Archer over loads three fusion reactors, which explode and cause a sub space breach, and he is cured.. and thrown back in time to just after he was first injured... only this time, his injury is not permanent.

Love this one, too.

"I offer you a Vulcan prayer, Mr Suder. May your

death bring you the peace you never found in

life." - Tuvok.