Season 5, Episodes 13 and 14: “Patient X”/“The Red and the Black”
Original airdates: March 1 and March 8, 1998
After going several rounds with multi-part mytharc episodes that froth quite a lot but pay out not much at all, “Patient X” and “The Red and the Black” are basically just a joy. Here are two completely comprehensible episodes that manage to introduce a new layer to the conspiracy without further obscuring the big picture, and, bonus, they've got some lovely bits of character development and excellent performances from nearly everyone present. Has someone been peeking at my Christmas list?
[Destiny, fate, how to throw a curveball.]