At the end of "Cold Front" episode
Daniels is killed by Silik.
reappears in "Shockwave. Part II" episode (and in Part I, but that doesn't matter here).
Upon questioning by Captain Archer he can offer only an explanation as vague as
"He did... in a manner of speaking".
Is it explained anywhere in more details what actually happened in a timespan between these two episodes (or to be more precise -- what actually happened by the end of "Cold Front" episode)?