I just saw this episode for the first time tonight, although I’m sure it’s probably fairly old. Was that really Sean Connery as the voice of the Snowman, or was it an impersinator?
I don’t really know. I’d suspect an impersonator since there doesn’t seem to be any evidence webwise that Sean Connery voiceovered anything other than in Dragonheart. But the episode reairs on Sat. October 20 at 4:30P EDT, so I’m going to record it and scroll through the credits because I want to know myself.
He (if it is an impersanator) does such a good job that I’m not sure. 
I don’t think it’s so far fetched that it might be Connery, 'cause of Dragonheart. Either way, it was funny as hell. “I’m Man. Snow Man.” Ha ha ha!
I agree with bean_shadow that the voice sounded so much like Connery that that is the first thing I thought of when I heard it. “Is that…nah, can’t be…”
Impersonator. Like the giant conquering robot episode uses an impersonated Christopher Walken’s voice. They like to use both voices frequently in Courage.