Marvin was voiced by Stephen Moore in the original 1970s radio series and in the TV series. Although there's a different chap trundling about in the suit in the TV series (David Learner, who deserves a shoutout for being stuck inside the 'tin can'), Moore still did the voice.
They broadcasted a 2014 abridged live…

I reallllllly can't wait to find out who's the donor/father of Laurie's kid. I'm hoping it's completely unexpected and she's picked out an unlikely source for her own logically consistent but bizarre reasons. (They've never mentioned her having a partner on the show - no one at her side during the party at her house…