|Performing as compound sentry 1 (Season 4)|
|Role:||1. Gaines hitman #2|
2. Harris's mercenary
3. LAPD officer
4. CTU worker 1
5. CTU worker 2
6. Compound sentry 1
7. Compound sentry 2
8. Dawn Brigade separatist
- In Day 1: 1:00am-2:00am, he played a hitman that tried to kill Richard Walsh and Jack Bauer at 2350 Dunlop Plaza. He was the second character to be killed by Jack Bauer.
- In Day 1: 7:00pm-8:00pm and 8:00pm-9:00pm, he played one of Harris's men in the camouflaged shelter.
- In Day 2: 10:00am-11:00am, he played a policeman that accompanied this officer to interview Gary Matheson. Later in the episode, he played two separate CTU workers that were killed in the explosion.
- In Day 4: 12:00pm-1:00pm, he played the third compound sentry that Jack kills, getting shot in the leg and then chest. He reappeared later in the episode as another sentry, getting shot by the marines. He claimed this role was his 31st death on the series.
- In Day 5: 10:00am-11:00am, he played a Dawn Brigade separatist at Ontario Airport, taking the place of Jerry G. Angelo's character. He was amongst the men waiting to ambush CTU troops, but was outflanked and shot from behind. He presumably survived the initial shooting, as later he is seen being shot by Jack Bauer.
Donno is tied with Randall Archer for the largest number of different roles on the series.
Gallery of roles
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