Nebulous is a science fiction comedy show written by (and also starring) Graham (Ideal) Duff, which follows the adventures of Professor Nebulous (played by Mark Gatiss) and the team at K.E.N.T. It's very amusing and extremely well written, here's a Wikipedia link to learn more.
This illustration was for the Radio Times for the start of the third series in 2008. You can catch the show from the beginning on BBC Radio 7 on Tuesday nights or if you are a UK resident you can go to the BBC iPlayer online and do a search for Nebulous for the listen again option. Its very good, you'll enjoy it.