as Leonard
2004
as Himself
1987
as Leonard
2018
as Self - Comedian & Co-Host, "StarTalk"
2019
as Self - Relationship Expert
2019
as Self
2009
as Self - Host
2022
as Self
2020
as Himself
2025
as Bill Frisby
2015
as Leonard
2018
as Self - Comedian & Co-Host, "StarTalk"
1 ep.
