The couple's career paths seldom crossed for the first few decades of their marriage. He had recurring roles, some larger than others, on TV shows including Pacific Station, C.P.W., Law & Order: SVU, Holding the Baby, Friends, and The Sopranos (via IMDb), while some of her more memorable roles were in Dinosaurs, Coach, 90210, and Arrested Development (via IMDb). Toward the end of their long and very busy careers, though, the two finally acted together in the animated FX spy spoof Archer.

On the show, Walter played the hard-drinking spymaster (and spy mother) Malory Archer, while Liebman was Ron Cadillac, an aptonymically-correct used car dealer she married in season 4. While Liebman (or his voice) only appeared in 9 episodes of the show, the last one in 2016, the second episode of Season 11 displayed a placard reading "In Loving Memory of Ron Leibman" after his 2019 death (via Newsweek). Sadly, it seems that Season 12 may now feature a similar tribute to Walter.