5: TV's Buffy and Faith, for two
6: Put into the overhead bin
9: Creator of the universe
24: Trials and tribulations
26: It's about 26.4 gallons
28: Room with a number of wives
29: Rust, tarnish, or laughing gas
31: Muhammad Ali a.k.a. 'The Louisville ___'
43: Acknowledges silently
50: Responds correctly on 'Jeopardy!'
53: Without expending much energy
55: McBride of 'Boston Public'