William Shatner has set his Twitter shields to maximum.

Shatner hasnt publicly stated a reason for the blocking.

Which admittedly does sound pretty bad.

Someone asked which cast members from the existing series would you like to guest star.

If you have stunt celebrity cameo casting, it completely pulls them out of it.

They feel like theyre watching aSaturday Night Livesketch.

Isaacs playfully noted the blocking on his account:

We suspect this will get sorted at some point.

He elevates his dialogue and makes it epic and truthful.

People who think hes hammy are people responding to other people doing funny impressions of him.

If you watch the original hes utterly brilliant.

He was one of Canadas top Shakespearian actors.

He brings that level of commitment and epic high stakes to what could have been ridiculous dialogue.

He and [Leonard] Nimoy together were a genius double.

Anyone who thinks theyre hammy should have a go at do it themselves.

Im trying to do it now and, Im telling you, its not easy.

Star Trek: Discoveryreturns Sunday, Jan, 7 on CBS All Access.