Presumably singing.

Radio Easily missable in the hinterland that is the back of the Radio Times is news of Easter Sunday's Drama on Radio 3:

Kafka the Musical
Sunday, 20:00 on BBC Radio 3

Murray Gold's new play starts from the suitably Kafkaesque premise that Franz Kafka finds he has to play himself in a musical about his own life. The play - or is it the musical? - introduces Kafka and the audience to some of the key characters in his life, Milena Jesenska, Dora Diamant and Felice Bauer.

Starring Mr. David Tennant as Mr. Franz Kafka.  Presumably singing. Which is you'll agree very exciting.  Except, what's this?

United
Sunday, 21:00 on BBC Two

Drama based on the true story of Manchester United's legendary Busby Babes, the youngest side ever to win the Football League, and the 1958 Munich air crash that claimed eight of their number. The film draws on first-hand interviews with the survivors and their families to tell the inspirational story of a team and community overcoming terrible tragedy.

Starring Mr. David Tennant as Mr. Jimmy Murphy. Written by Chris Chibnall. Directed by James Strong.

This is one of those occasions when the people who schedule the television need to talk to the people who schedule the radio so that the people who have the single tuner Freeview+ box don't have to make impossible decisions about which channel to record.  Kafka the Musical it is then ...