Get_iplayer looks like a command line program, correct me if I'm wrong. On the outside chance you missed it in the menus, try searching for it with Application Finder (menu > accessories > application finder).
Some other information that could be helpful:
1. Google "get_iplayer ubuntu 12.04" or something similar
2. Here's a link from #1 - http://squarepenguin.co.uk/guides/tv-download-guide/
3. YouTube search "get_iplayer" or something similar
Some other information that could be helpful:
1. Google "get_iplayer ubuntu 12.04" or something similar
2. Here's a link from #1 - http://squarepenguin.co.uk/guides/tv-download-guide/
3. YouTube search "get_iplayer" or something similar