Also there are "moments" on here that can be serious like Golden Age Black Canary and Blue Beetle Ted Kord.
It's crazy how many characters on this show have died, if it weren't for the villains from the JLU ep Alive! this show probably would've amassed a body count higher than the entire DCAU.
Deaths from the top of my head;
spoilers ahoy as well:
Thomas Wayne - shot
Martha Wayne - shot
Morgan Le Faye - vanquished by Excalibur
Slug - ripped apart by Outsiders and Wildcat
Wildcat - for like 30 seconds but I wanted to shoehorn him in - heart attack
Boston Brand - shot
Ted Kord - Blown up
PLATELET! - ripped apart by virus
Wong Fei - poisoned
Jewellery shop worker - Joker laughing gas
Aquaman's beluga whales - by whaling industry
Frackload of Gordanians including General Kreegar - blown up aboard the Eye of Zarad
Astaroth - vanquished by iron
Jim Craddock - hung by the neck
Tornado Tyrant - ripped apart by Red Tornado
Master Tadashi - Cut down by sword
Equinox - first by energy blast then again shattered by time vortex
Black Canary (original) - crushed by debris in fiery building
I'm sure there's a few I've missed.