What becomes of a companion when they leave the TARDIS? It's a question that Doctor Who, at least on TV, has touched on surprisingly infrequently. It's also the subject of 'Lucky Day,' an episode that sidelines the Doctor and Belinda in favor of catching up with Ruby Sunday and the UNIT gang.
Doctor-lite episodes are nothing new. Indeed, they've often led to some of the show's best instalments – think 'Blink,' 'Turn Left,' and last year's peerless '73 Yards' to name just a few. 'Lucky Day' is not in the same leagues as those all-timers, but it's still a solidly enjoyable episode, even if it does feel weird only checking in on Belinda's voyage home in the pre-titles sequence.
