The Zeta Project 

A spinoff from "Batman Beyond" (or "Batman Of The Future" as it's known outside North America for some reason - happily, it's not necessary to be familiar with the show to watch this), "The Zeta Project" follows a sentient robot on the run from the NSA (National Security Agency), because he wishes to not be a robotic assassin any more (he's discovered that one of the victims he was assigned to kill was innocent, and that meant any of them could have been innocent). Using holographic disguises - mostly as a Brendan Fraser lookalike - he's joined in the search for the man who played the biggest role in his creation by another runaway, a teenage girl called Rosalie (Zeta calls her Ro, she calls him Zee)...

This premise will be familiar to anyone who remembers "Short Circuit" (and its sequel), Gene Roddenberry's pilot "The Questor Tapes" and "The Iron Giant," among others (and fans of "Robocop" and "Futurama" (home of Bender) note the respective voices of Kurtwood Smith and Lauren "Amy Wong of the Mars Wongs" Tom as two of the agents in pursuit); but fortunately that means it's pretty interesting when we're not dealing with the "Fugitive"-type aspects of the plot. Even more fortunately, we're in WB-cartoon territory - they're usually reliable when it comes to above-average animation for TV, and "The Zeta Project" is no exception, being often exciting stuff and with some good characters on both sides of the fence (particularly the likeable heroes and the eager but often hotheaded Agent West).

Sky One started showing this around the same time "Alias," "Enterprise" (both also on Sky) and "Smallville" (on Channel 4) began in the UK. Though the least hyped, this is the only one I really watch. (Incidentally, my little sister's called Zeta, though pronounced Zee-ta not Zay-ta. As far as I know, she isn't a robot, nor can she change appearance.)