Were there any non "misson-x" sets from the LEGO Alpha Team Range (as in with the PC Game)?
I think the original Alpha Team sets are the one's you're looking for, including the LEGO Alpha Team Secret Mission Collectors Pack which includes:


[bs:6771] with Ogel
[bs:6773] with Dash
[bs:6774] with Cam and Flex


There are also:


[bs:6772] with Radia
[bs:6775] with Charge, Crunch and Tee Vee (a robot)
[bs:6776] with Ogel and two minion commanders.