One of his first acting roles was in 1984, as a football club hooligan for MSV Duisburg in the crime series Tatort (episode Two kinds of blood).

Bär received his first lead role in 1984, appearing Dominik Graf's hit (TV movie) Treffer [de] as 'Franz'.

Bär also has narrated many audiobooks into German, for various authors, including Mo Hayder, Håkan Nesser, Jacques Berndorf, Thomas Krugerand and Stieg Larsson.

Together with the Berlin association pro futura, Bär supports the future prospects of young people and the long-term unemployed.

This was inspired by the much-acclaimed Tatort episode 'Manila' filmed in 1998, which dealt with the fate of Filipino street children and child maltreatment.

For this, he and Klaus J. Behrendt received from Kinderlachen Eingetragener Verein which cares for sick and poor children mainly in Germany, the KIND Award.