Add a new character.. quite the opposite for me I'm afraid, I would like a cull.
Series 1-3 were absolutely brilliant, but, since then its been mediocre at best and is quickly becoming a sitcom.
Raj's unbelievably boring sister... out, Bernadette out.
The original storyline was great as it was 4 uber-geeks coping with life and occasionally love but full time relationships are what I believe have numbed this show.
Last episode I viewed I honestly expected the Friends title music to play at the end.