Summer Olympics, 8 p.m., NBC
Tonight, Swimming, finals: men's 100m butterfly, men's 50m freestyle, women's 200m backstroke, women's 800m freestyle; track and field: men's shot put final; diving: women's springboard; volleyball, women's: USA vs. Serbia; trampoline: men's. Nobody makes better muscle faces than shot putters.
The Untouchables, 8 p.m., ABC
I love the dinner party scene so much.
Swamp Wars, 9 p.m., Animal Planet
“A rattlesnake takes a dip in a pool, while another hides out in a woman's car.” I had no idea rattlesnakes could swim. Can they also climb trees?