The three I don't have (assuming I'm wrong about 34 across) are:
1 Across. A team that forms Devastator. D________O_
34 Across. Can scream for a really long time. S___
17 Down. Didn't save Sentinel from Megatron. (I'm not sure, is it 'army'? I wrote 'arse' for fun, but I'm fairly sure that's not right) A___
It's actually a really bad Australian accent. He's basically Steve Irwin.